My first absence! I know you all missed me, but the show must go on! I want to thank all of you for being on your best behavior for the sub.
Today we did a bit of reviewing the angle pair relationships and area and perimeter. Here is a link to download assignment #12.
Coming up:
- BM 3-4 and retake BM 5 on the first block (18/19)
- Grade Report #1 due Monday 9/24
Posting for Points Question:
What are the formulas for the perimeter and area of the 4 shapes (rectangle, parallelogram, triangle, and circle) that are on our next benchmark?
51 Comments
September 18, 2007 at 5:58 pm
umm i was absent monday what did i miss?
September 18, 2007 at 7:03 pm
Perimeter—— is adding all the sides up
Circle is =2pi r
Area
Rectangle/Square/Parallelogram—-Base x Height
Triangle—–1/2 Base x height
(height is 90* to the base)
Circle——pi rSquared
(pi=c/d)
September 18, 2007 at 7:46 pm
The perimeter is the same for all shapes you add all the sides together, except circle P=2pi radius
Area
Rectangle/Parallelogram -A=Base x height
Triangle-A=1/2 Base x height
-height is 90*(to the base)
Circle-A=pi(radius)squared
September 18, 2007 at 8:05 pm
Ok For perimiter you just gotta add all 4 sides
but that obvously wont work on circles
for circles the formula is
2pi and radius
To find the area you gotta multiply base times height
example
-Rectangle its just base times height
-circle is pi radius then square it
-Triangle is half the base times height
make shure its 90 degrees
Thats All….
September 18, 2007 at 9:06 pm
Ok, so perimeter, you just add up all the sides and you get it. The area is just multipling the base and height.
With the circles, you 2ri radius.
But sometimes you dont get a full square, then you use base x height 1/2.
September 19, 2007 at 9:20 am
Perimeter: add all the sides up
circle- 2pi r Squared
Aera: rectangles and squares- Base x Height
triangle- 1/2 Base x Height
circle- pi r Squared
September 19, 2007 at 11:03 am
Perimeter: add all the sides up
Area:
squares- B x H
triangle- 1/2 B x H
circle- pi r2
circumference- 2pi r
September 19, 2007 at 2:55 pm
Area:
Circle= 2Pi R
Square= Base times height
Triangle= half base times height
Parrolellogram= base times heighth
Circumference of a circle is Pi R Squared
Perimeter: Circle, Triangle, Parrelelogram, Square are all the same add up all the sides.
: ).
September 19, 2007 at 2:57 pm
To find the perimeter of a rectangle, parallelogram, and triangle you add all of the sides up.
To find the perimeter of a circle you use 2PiR.
To find the area for squares and parallegrams and rectangles you multiply the base times the height.
For the area of a triangle you multiple 1/2 the base times the height.
For the are of a circle you use PiR squared.
September 19, 2007 at 3:11 pm
Perimeter is adding up all the sides of the shape
circumference is 2piR
Area
squares and rectangles = length times width
triangles = its 1/2 base times height
circles = pi r squared
September 19, 2007 at 3:54 pm
the perimeter you just add up al the sides
the circumference is 2piR
area: for squares and rectangles length times width
triangles: 1/2 base times height
circles: pi R squared
September 19, 2007 at 4:09 pm
The Perimeter is adding all the side any shape except a circle.
The circumference of a circle is pi r squared.
The area for Parallegrams and Rectangle is base
times height.
The area for a circle is 2pi r.
The area for a triangle is 1/2 base times height.
September 19, 2007 at 6:00 pm
-To find the perimeter of a Rectangle, a Parallelogram, and a Triangle is adding all the sides up. Area for a Rectangle and a Parallelogram is LxH.
Area for a Triangle is 1/2 BxH.
-To find the circumference of a Circle, the formula is 2piR. The formula for Area is piR squared.
September 19, 2007 at 7:13 pm
-Perimeter-add up all sides
-Circumference of a circle is 2pi R squared
-parallegrams and rectangles is base tine height
-Triangle is half base time height
September 19, 2007 at 7:23 pm
Perimeter: add all sides
Circumference: 2 pi R
Area:
Rectangles, Parallelograms and Squares- B times H
Triangles- 1/2 B times H
circles- pi r squared
September 19, 2007 at 7:25 pm
Perimeter:
-Add all sides up (same for all except the circle. Circle=2πr)
Area:
-[rect/parallel=base x height]
-[triangle=(½)base x height]
-[circle=πr²]
September 19, 2007 at 7:55 pm
Ok here goes…..
Perimeter: add up each side (except for circle 2pieR)
Area:
(Rectangle/squares etc.- Base x height)
(Traingle- 1/2base x height)
(Circle- PieR^)
Hope its all right!
PeaceN’Love
-Alexandria<3
September 19, 2007 at 8:10 pm
Perimeter : Add up all the sides
For Circle: (2)(Pie)(R)
Area:
Rectangle, Square, Parallelogram: Base x Height
Triangle: 1/2 Base x Height
Circle: Pie R Squared
September 19, 2007 at 8:14 pm
PETIMETER
Ok perimeter, you just add up all the sides which equals the permiter
AREA
The area is just multipling the base and height.
With the circles, you πr² radius.
But sometimes you dont get a full square, then you use base x height 1/2.
September 20, 2007 at 6:24 am
PERIMETER:
When your finging the perimeter for a rectangle,triangle, and a Parallelogram you just add up all the sides.
When your finding the perimeter of a circle you use the formula 2PieR. (radius)
AREA:
The formula for finding the area of a rectangle and Parallelogram is b x h. (base x height)
For finding the area of a triangle is b x h divided by 2.
Finding the area of a circle is Pie R Squared
- christian g
September 20, 2007 at 4:06 pm
AREA PEREMITER
circle- pie R squared R pie x2
square- L x W add all sides
rectange- L x W add all sides
triangle- 1/2B x H add all sides
parallelagram- B x H add all sides
September 20, 2007 at 4:16 pm
The formula for finding the perimeter of a square, rectangle, triangle, or paralleogram is to add all sides to find the solution. The way to find the circumference of a circle is by using the formula c=2 pi squared.
To find the area of a square,rectangle or paralleogram, use the formula A=base times height.
To find the area of a triangle, use the formula A= 1/2 base times height.
To find the area of a circle is to use the formula A=pi r squared.
September 20, 2007 at 5:20 pm
If your looking to find the perimeter of a shape there is none(JUST KIDDING).there are actually many different formulas for each shape.
************************************************************
If you want the perimeter for square,paralleogram, and rectangle it is [base times hight]
***********************************************************
But if its area for a triangle its !/2 base time ight
For the square and rectangle its base times hight
And last the circle is pi R squared
sammy ^-^
September 20, 2007 at 7:48 pm
-the perimeter is all the sides added up
-length times width is the area for triangles and rectangles
-the circumference for a circle is 2 pi r
-1/2 base times height is for triangles
-the area for a circle is pi r squared
September 20, 2007 at 8:47 pm
perimeter is adding all the lengths of the sides up
for a circle it is 2pir
area is base times height
for a circles area it is pi r squared
for a triangle it is half base times height
September 20, 2007 at 9:02 pm
the formulas for perimeter & area for these different angles:
rectangle;
perimeter – you add all the sides together
area – multiply the width x height
triangle;
perimeter – adding all sides
area – cut the base in half and multi. base x height
circle;
get the radios and multi. by 2
area – multi. by 2nd power
parallelogram;
perimeter – add all sides
area – multi. base x height but get the inside height
September 20, 2007 at 9:37 pm
peerimeter is adding all the sides up to get your answer
area is the space inside your shape.
1. (rectangle,square,and parrellelgram)
A= b*h, l*w
A=base*height
2. (triangle)
A=1/2 b*h
a= 1/2 (base)(height)
height is 90 degrees(to the base)
3.(circle)
A=Pi*r sq.
A=pi(radius) sq.
(radius is half the diameter)
to tell the difference between Area and Perimeter is we use proper units. Area units are units sq. and for Perimeter we use single units.
September 20, 2007 at 9:54 pm
PERIMETER
>square/rectangle/triangle
-add up all sides
>circle
-P=2*pi*radius
AREA
>square/rectangle
-A=B*H or A=l*w
>triangle
-A=1/2*B*H
>circle
-A=(pi)*(radius)sq.
**To tell the difference between area and perimeter, we use proper units. Area units are units sq. and perimeter/circumferce are use single units.**
September 21, 2007 at 7:12 am
parrellelgram;
A= Base x hieght
P=add all sides together
Triangle;
A=1/2 Base x Hieght
P=add all sides together
rectangles/squares;
A=Base x Hieght
P= add all sides
September 21, 2007 at 9:35 am
To find the perimeter of a rectangle, parallelogram, and triangle you add all of the sides up.
To find the perimeter of a circle you use 2PiR.
To find the area for squares and parallegrams and rectangles you multiply the base times the height.
For the area of a triangle you multiple 1/2 the base times the height.
For the are of a circle you use PiR squared.
September 21, 2007 at 9:44 am
Perimeter- adding all the sides up
Circle =2 pi r
Area=pi r x r (squared)
Rectangle/Square-A=Base x Height
P=all sides aded up
Triangle—–1/2 Base x height
(height is 90* to the base)
Circle——pi rSquared
(pi=c/d)
September 22, 2007 at 9:39 am
Rectangle-A=base x Height
P=add up all the sides up
Square-A=base x height
P=add up all the sides
Triangle-A=1/2base x height
P=add up all the sides
Circle-A=(pi)rsquare
P=r pi x2
September 22, 2007 at 10:20 am
Rectangle-area=base x height
perimeter=add all the sides together
Square-area=base x height
perimeter add all the sides together
triangle-area=1/2 base x height
perimeter=add all the sides together
circle-area=(pi) r squared
perimeter=2(pi)r
September 22, 2007 at 12:31 pm
Rectangle area = base x height
rectangle perimeter = add all the sides
square area = base times hight
square perimeter = add all the sides
triangle area = 1/2the base times the hight
perimeter =add all the sides
circle area = pi radis squared
circle perimeter = 2 pi times the radius squared
September 24, 2007 at 1:36 pm
*circle~
Perimeter- 2(pi)radius
Area- (pi)radius(squared)
*Square~
Perimeter- you add all of the sides together
Area- you multiply (base)x(height)
*Rectangle~
Perimeter- you add all of the sides together
Area- you multiply (base)x(height)
*Triangle~
Perimeter- you add all of the sides together
Area- you multiply 1/2(base)x(height)
September 24, 2007 at 6:47 pm
The Perimeter for all of them is that you add up all the sides.
For the circle it is 2 (PI) r
The Area-
Triangle-1/2 base X height
Rectangle & Square- base x height
Circle- (PI) r Squared
September 24, 2007 at 8:20 pm
The perimeter is equal to adding up all of the sides except in the case of a circle in which it is 2 (PI) r
Area-
rectangle and square are base times height
triangle is 1/2 base times height
and a circle is (PI) r squared
September 24, 2007 at 8:23 pm
I apologize I forgot the parallelogram which is the same formula as the square
September 24, 2007 at 9:13 pm
parallelogram & rectangle – perimeter= add up all the sides
area= base X height
triangle-perimeter= add up all the sides
area= 1/2base X height
circle- perimeter=2(pi)r
area= (pi)r^
September 25, 2007 at 11:56 am
Rectangle-A=base x Height
P=add up all the sides up
Square-A=base x height
P=add up all the sides
Triangle-A=1/2base x height
P=add up all the sides
Circle-A=(pi)rsquare
P=r pi x2
September 26, 2007 at 2:53 pm
rectangle: base x hight= area
add all the sides = perimeter
square: base x the hight=area
add up all the sides= perimeter
triangle: 1/2 base x the hight= area
add up all the sides= perimeter
circle: (pi)Rsquared
Rsquared pi
September 26, 2007 at 3:54 pm
kelsey w. 4
square rectangle
per.= 4s per. =2L+2W
area=s squared area= LW
triangle
per.= add up all sides
September 26, 2007 at 3:57 pm
kelsey w. 4
area = half x base
x height
circle
c=(2)(pi)radius
area=(pi)(radius)(squared)
September 26, 2007 at 7:43 pm
rectangle : 6in. by 2in. 6×2=12 2×2=4 12+4=16 the perimeter is16. The area is 6in.x 2in.=6in^2. Triangle I have 6 in. for my hight 8 in. for my base, and 10in for my slopping side. 8+6+10=24 in. A= 1/2 (8)(6)=24 in. Circle is r 6 ft. ,2 pi r ,2 pi 6, 12 pi ft.thats the perimeter. Now the area pi r ^2, pi 6^2 =36 ft.^2. A parallelogram’s perimeter is 8 hight 24 base and 12 for the slopped side. 20+64+12+24+12= 72un^2 and for the area I’ll do24×8 = 96un^2
September 26, 2007 at 7:49 pm
The area for a square, rectangle, and parrellogram is length x width.
The perimeter of a square, rectangle, triangle, and parrellogram is to add up all sides.
The area for a triangle is base x height divided by 2.
The area for a circle (pi)(r)( squared).
The circumferance for a circle is (2)(pi)(r)
September 26, 2007 at 7:51 pm
I’m sorry, no wonder mine turned out longer. Do I got my 4 points anyway.
September 26, 2007 at 9:20 pm
To find the area of a Rectangle and square is base times Height
and for the perimeter add up all the sides.
To find the area of a Triangle its 1/2base times height
P=add up all the sides
And to find the area of circle is pi times radius squared
and the circumforance is 2 times pi times radius
Pi=3.14
September 30, 2007 at 1:20 pm
Perimeter of Rectangle, parrellogram, and the triangle
is to add up all sides
The Perimeter of a circle (Circumfrence) is 2 x Pi x Radius
Area of Rectangle: Length x Width
Area of Parrellogram: Length x Width
Area of Triangle: Half of base x Height
Area of Circle: Pi x radius squared
September 30, 2007 at 1:44 pm
To find the perimeter of rectangles, parrellgrams and squares all you have to do is to add up all the sides.
To find the perimeter of circles use the formula c=2Pi r
To find the area of squares and rectangles and parrelograms use the formula a=b times h (base times height)
for triangles use 1/2 base time height
for circles a=Pir to the second
September 30, 2007 at 3:10 pm
Perimeter—— is adding all the sides up
Circle is =2pi r
Area
Rectangle/Square/Parallelogram—-Base x Height
Triangle—–1/2 Base x height
(height is 90* to the base)
Circle——pi rSquared
(pi=c/d)
September 30, 2007 at 3:13 pm
Perimeter—— is adding all the sides up
Circle is =2pi r
Area
Rectangle/Square/Parallelogram—-Base x Height
Triangle—–1/2 Base x height
Circle——pi rSquared
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