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:[br]1. Congruent Angle Pairs[br]2. Proportional Sides
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 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[br][math]\angle[/math]M
Identify the congruent angle pairs
Use the congruent angle pairs to select the correct angle measure of[br][math]\angle[/math]K
Identify the congruent angle pairs
Use the congruent angle pairs to select the correct angle measure of[br][math]\angle[/math]J
SRT.2 Proportional Sides
What is the scale factor?
What scale factor takes [math]\Delta[/math]WXO to [math]\Delta[/math]ACB?
What is the scale factor?
What scale factor takes [math]\Delta[/math]CAB to [math]\Delta[/math]XWO?
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
Use proportional sides to answer the question below
Find the length of side YM
For extra help, you may want to work through Khan Academy's Introduction to Similar Triangles
https://www.khanacademy.org/math/geometry/hs-geo-similarity/hs-geo-triangle-similarity-intro/v/similar-triangle-basics