M7U1L1 What are Scaled Copies?

​Warmup & Engagement

1. Go to Clever

2. ​Complete Xtramath

3. Go to Clever

4. ​Complete Khan Academy assignment: Explore scale copies video and practice

​

​Complete Khan Academy Questions

1. ​Go to Clever

2. ​Go to Khan Academy

3. ​Complete Explore scale copies

​

Vocabulary

​scaled copy

A scaled copy is a copy of an figure where every length in the original figure is multiplied by the same number or scale factor.

​

For example, triangle DEF is a scaled copy of triangle ABC. Each side length on ABC triangle was multiplied by 1.5 to get the corresponding side length on triangle DEF.

​Look at Portraits A–E. How is each one the same as or different from the original portrait of the student?

​

​Get Portraits link from google classroom:

https://access.openupresources.org/curricula/our6-8math/en/supporting-material/7751/index.html

Open Ended

Some of the sliders make scaled copies of the original portrait. Which of the Portraits A–E do you think are scaled copies? Explain your reasoning.

Open Ended

Some of the sliders make scaled copies of the original portrait. Which of the Portraits A–E do you think are scaled copies? Explain your reasoning.

Multiple Choice

Some of the sliders make scaled copies of the original portrait. Which of the Portraits A–E do you think are scaled copies? Explain your reasoning.

• a

• b

• c

• d

Multiple Choice

Tyler says that Figure B is a scaled copy of Figure A because all of the peaks are half as tall.

Do you agree with Tyler?  Explain your reasoning.

• Yes

• No

Multiple Select

Here is a figure that looks like the letter A, along with several other figures. Which figures are scaled copies of the original A? Explain how you know.

• 1

• 2

• 3

• 4

Multiple Select

On top is a picture of the Rose Bowl Stadium in Pasadena, CA.  Here are some copies of the picture. Select all the pictures that are scaled copies of the original picture.

• A

• B

• C

• D

Fill in the Blanks

Complete each equation with a number that makes it true.

5 *

= 15

Fill in the Blanks

Complete each equation with a number that makes it true.

4 *

= 32

Fill in the Blanks

Complete each equation with a number that makes it true.

6 *

= 9

Fill in the Blanks

Complete each equation with a number that makes it true.

12 *

= 3