Mr. Hancock's Math 3-4 February 23, 2011

Mr. Hancock's Math 3-4 February 23, 2011

Objectives: Today you will be able to ...

- Understand the concept of similarity and how similar figures are related

- Set-up proportions to solve problems involving similar figures

Homework: Worksheet

Mr. Hancock's Math 3-4 February 23, 2011

Similarity

1. What does it mean for two figures to be similar? Be as clear and specific as possible.

2. What do you know about the values of the sides of similar figures?

3. What do you know about the values of the angles of similar figures?

Mr. Hancock's Math 3-4 February 23, 2011

To practice similarity we are going to be working with different partners.

Take the next three minutes to fill out your partner sheets so that you know who you will be working with when.

Mr. Hancock's Math 3-4 February 23, 2011

Practice solving for missing sides

Mr. Hancock's Math 3-4 February 23, 2011

Now pair with your Partner #1I will pass around problems 1 - 4 for you to work on

Mr. Hancock's Math 3-4 February 23, 2011

Mr. Hancock's Math 3-4 February 23, 2011

Now pair with your Partner #2I will pass around problems 5 - 8 for you to work on

Mr. Hancock's Math 3-4 February 23, 2011

Mr. Hancock's Math 3-4 February 23, 2011

Sometimes we are only given one figure. Although it can be challenging to think about - we still only need to set up a proportion to solve for the missing values

A B

C

1. If ∆ABC is similar to ∆DEF, and the base of ∆DEF is 44, then what is the height of ∆DEF?

Mr. Hancock's Math 3-4 February 23, 2011

Now pair with your Partner #3I will pass around problems 9 - 11 for you to work on

Mr. Hancock's Math 3-4 February 23, 2011

Mr. Hancock's Math 3-4 February 23, 2011

Now pair with your Partner #4I will pass around problems 12 - 14 for you to work on

Mr. Hancock's Math 3-4 February 23, 2011

Mr. Hancock's Math 3-4 February 23, 2011

Critical Questions of the Day:

1) Describe how you know if two figures are similar. What characteristics should you look for?