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9-12 Extra Support Materials for Algebra 1 Unit 8 Lesson 3

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Algebra 1 Geometry Algebra 2 •Extra Support Materials for Algebra 1

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Extra Support Materials for Algebra 1

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Lesson 3

3.1 Warm-up 3.2 Activity 3.3 Activity

Unit 8, Lesson 3

Squares and Equations

Extra Support Materials for Algebra 1

3.1

Warm-up

Find the value of each expression mentally.

3.2

Activity

Let .

Select all pairs of values that could be and .
List one other possible pair of values for and that make the equation true.
Use the diagrams to find the value of the side length for each square, then find the value for .

a. The square has an area of 25.

b. The square has an area of 36.

c. The square has an area of 100.

3.3

Activity

Here are some equations and a list of numbers. Which numbers are solutions to which equations?

-13
-11
-10
-9
-7
7
9
10
11
13

None