Similar Solids

So what happens to a solid’s perimeter, area, and volume if you double the edge length? That’s what we looked at today. We started class going over HW #4 review on the board. We then did a quick investigation followed by some examples of BM 26. Here are the notes and the HW is #5 Similar Solids WS.

8.4-8.5 Similar Triangles

Now the benchmark problems!

Today we looked at similar triangles. The main way to prove triangles are similar, some additional ways to prove they are similar, and some examples of the upcoming benchmarks (BM 25, 27, and 28). Notice there are a lot of “proving” triangles are similar? Don’t let that get you down, it’s our only “proof” benchmark.

The assignment for today is #3 483 #9-27 (odd), 39-47 (odd), 50-53, 55, 62-65. We will continue with these sections next week.

Coming Up: HW Quiz on Monday, 1/14

Posting for Points Question:

What are the various ways to prove triangles are similar?

Midsegments

Another slight change in plans- no benchmark retakes today, we will retake them next week.

First off, we got back our benchmarks from before Thanksgiving and went over them. We also got the solutions to the benchmark review from yesterday. Check them out here.

We then took a look at Midsegments, their properties, and some examples of benchmark 20 (to be taken next Thursday). The homework assignment is #39 page 290 #12-19 (all), 21, 22, 28, 29, 47-49 (all). We also have another grade report due, too.

Coming up:

• Grade Report #3 due Thurs/Fri block (11/29-30)
• Study Group on Friday after school
• Chapter 4 Test on Monday, 12/3
• Practice Final Thurs/Fri, 12/6-7
• Benchmark Deadline Tuesday, Dec. 11
• Final Exams: Wed. 13-Period 4, Fri. 14-Period 5 and 6

Posting for Points Question:

What is a midsegment. What are the two properties of a midsegment? Give an example of finding a midsegment or 3rd side within a triangle.

Benchmark Review 2

I hope you all had a nice Thanksgiving. Due to my absence today, my plans for the last few weeks of the semester got seriously altered. No worries, we’ll get it done.

Today we worked on the Benchmark Review #2. This review covered a lot of the benchmarks we took last week before Thanksgiving. Performance wasn’t what I hoped, mostly due to tiny mistakes (like a ASA instead of AAS, solving for x and not plugging it back in, the last reason of a proof incorrect), so we will work on those. However, we only have 2 weeks left to figure it out!

Here’s the link to download.

Coming up:

Benchmarks 14, 18, 19, 20 (new one!), 21, 22, and 24 on Tuesday/Wednesday Block

Grade Report #3 due Thursday/Friday block

Chapter 4 Test on Monday, 12/3

Benchmark Wednesday

With Monday being block and Wednesday being a short day, it makes perfect sense to take Benchmarks today. So the new benchmarks, BM 18, BM 22, and BM 24, as well as retakes on BM 14, BM 19, and BM 21 took place today.

Coming Up:

– Grade Report #3 Due Thurs/Fri block (11/29-30)
– BM 18-24 (some new and some retakes) on Tues/Wed block (11/27-28)
– Ch. 4 Test Monday, 12/3
– Practice Final Thurs/Fri block (12/6-7)

Posting for points Question:

Which was the hardest benchmark of today’s group for you and why?

Review

With Wednesday’s big day for benchmarks, today we review a lot!

We took a look at all the benchmarks that we will take, from proving 2 lines are parallel (BM 14), to proving 2 triangles are congruent (BM 24). Here are the solutions to the two assignments from last week as well (EXCELLENT STUDYGUIDES!). #36 solutions and #37 solutions.

Coming up:

BM 14, 18, 19, 21, 22, and 24 on Wednesday, 11/21