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SRT.2 Similarity Notes

SRT.2 I can use similarity conditions, congruent angle pairs and proportional sides, to determine if two figures are similar.

Similarity Conditions: 1. Congruent Angle Pairs 2. Proportional Sides

Guided Notes

Guided Notes

Similar (but not congruent) Triangles

Congruent Angle Pairs

What does the order of the letters in each triangle represent?

SRT.2 Conditions of Similarity: 1. Congruent Angle Pairs 2. Proportional Sides

SRT.2 Conditions of Similarity: 1. Congruent Angle Pairs  2. Proportional Sides

SRT.2 Congruent Angle Pairs

Similar Figures have congruent angle pairs

Similar Figures have congruent angle pairs

Identify the congruent angle pairs

Use the congruent angle pairs to select the correct angle measure of M

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Identify the congruent angle pairs

Use the congruent angle pairs to select the correct angle measure of K

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Identify the congruent angle pairs

Use the congruent angle pairs to select the correct angle measure of J

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SRT.2 Proportional Sides

What is the scale factor?

What scale factor takes WXO to ACB?

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What is the scale factor?

What scale factor takes CAB to XWO?

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Similar Figures have proportional sides

Similar Figures have proportional sides
Use the proportional side lengths to solve for unknown sides

Use proportional sides to answer the question below

Find the length of side TK

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Use proportional sides to answer the question below

Find the length of side YM

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For extra help, you may want to work through Khan Academy's Introduction to Similar Triangles