It’s a Terrific Tuesday for Learning Math! 1. Take out your homework: ACE 1

2. Begin your warm up: Spiral Review p.81 (54-63)

DEAR when you finish your warm up!

Warm Up Answers p.81 (54-63) 54) 55) 56) 57) 58) 59) 60) 61) 62) 63)

Homework check

Homework check, cont…

Family members: Glum & Tum Imposters: Sum & Crum

Glum Tum1.5 times as wide 4 times as wide1.5 times as tall 4 times as tall1.5 times the perimeter

4 times the perimeter

2.25 times the area1.5 x 1.5 = 2.25

16 times the area4 x 4 = 16

Angle measures are the same!

Sum Crum3 times as wide 2 times as wide2 times as long 1 time as tall

(same!)Mouth is 12 units wide and 2 units high

Mouth is 2 times longer than Mug and the same height as Mug

Nose is 6 units wide and 2 units high

Nose is 2 times longer than Mug and the same height as Mug

Yes, the findings support the prediction that the impostors will be Sum and Crum!

Impostors are those who have different scale factors applied to the x and y coordinates.

In other words…rules that the x & y are multiplied by the same number make family members!

2 questions before we move on… Can you describe to your neighbor

what scale factor means? the # you multiply the lengths of an

original figure by to stretch or shrink it

What might be some examples in the real world where scale factors might be used?

Movie screens, logos, billboards, blue prints, photographs, copied images, clip art …

Stretch Break!!

Make sure your notebook cover sheet looks like this:

#. Date Brief Description 1. 10-3 S&S Problem 2.1 day 1/ ACE

(1 a-e) 2. 10-4 S&S Problem 2.1 day 2/ ACE

(14-15)You Need: Calculator 2.1 Lab sheet from 2.1 Grid Sheet yesterday

BIG IDEA:Drawing and Identifying Similar Figures

How would you describe to a friend the growth of the figures that you drew?

They all increased in size…taller…or wider…or both!

Which members seem to belong to the Wump family? And which do NOT?

Mug, Zug and Bug have the same shape but Lug and Glug are distorted.

Let’s look back at yesterday’s lab sheet on the back of your homework…

NO! Lug is WIDE and SHORT Glug is NARROW and TALL

Are Lug and Glug related?

Family members (Mug, Zug, and Bug) have the SAME

angle measures!

The others (Lug and Glug) do NOT have the same angle measures…EXCEPT for the right angles, of course!!

How do the corresponding angles of the 5 characters compare?

Now, let’s look at the corresponding lengths of the characters…

► leg heights 1, 2, 3► nose widths 2, 4, 6► mouth widths 4, 8, 12

Did you notice any patterns?

Make sure your notebook cover sheet looks like this:

#. Date Brief Description 1. 10-3 S&S Problem 2.1 day 1/ ACE (1 a-

e) 2. 10-4 S&S Problem 2.1 day 2/ ACE (14-

15)

Homework is on page 33 in Stretching and Shrinking