11/18 7TH gRADE

Similar Shapes

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Multiple Choice

Similar or congruent?

• Similar

• Congruent

• No relationship

Multiple Choice

Are the following similar? Why or why not?

• Yes
• No, the corresponding angles are not equal.
• No, the ratios of the corresponding sides are not equal.

Multiple Choice

• A
• B
• C
• D

Multiple Choice

Find the length of x

• x = 1
• x = 2
• x = 7
• x = 1/7

Multiple Choice

Triangle ABC and XYZ are similar.  Use your knowledge of scale factor to find the length of X.

• 20
• 25
• 100
• 40

Multiple Choice

Similar or Congruent?

• No relationship

• Similar

• Congruent

Similarity
What? I will have the ability to identify similar shapes and compare the images.
Why? This is important because it is going to help me succeed in the up coming lesson.
How? I will know I have mastered this lesson by answering all the upcoming questions correctly, participate and explain my thinking.

• Similar figures- Figures that have the same shape but different size. (think dilations!)

  • Corresponding angles are congruent.

  • Corresponding sides are in proportion.

  • The symbol in ~.

​

​Vocab:

Angles of similar shapes

No matter how much smaller or bigger a shape is the angles are ALWAYS going to be the same/ congruent.
DISCUSSION: Think back to angle placement. What is corresponding angles and what do we know about them? Talk to your partner, be prepared to share.

​Corresponding Angles are congruent.

Multiple Choice

What angle is congruent and corresponding to angle R.

• <L

• <M

• <J

• <K

Multiple Choice

What angle is congruent and corresponding to angle M.

• <S

• <R

• <P

• <Q

Sides that will be compared to each other:
1. JL ~ PN
2. KL ~ MN
3. JK ~ PM

Example

​Corresponding sides will be compared to each other

Sides of similar shapes

Multiple Choice

Polygons that have the same shape and size are called

• Shapes

• Congruent

• Similar

• I am not sure

Multiple Choice

Polygons that have the same shape but their size is scaled up or down are called

• Shapes

• Congruent

• Similar

• I am not sure

​Proportional Sides

Multiple Choice

What line is corresponding with PQ?

• JK

• MG

• KL

• LM