Slope and similar triangles

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Presentation transcript:

Slope and similar triangles

a rise run 4 2 2 1 6 2 b c rise run 6 3 2 1 3 4 1 d e be de ac bc 4 2 Write a proportion to compare the rise to the run for each of the similar slope triangles Y a Triangle # 1 rise run 4 2 2 1 6 2 b Triangle # 2 c rise run 6 3 2 1 3 X 4 1 d proportion e be de ac bc 4 2 6 3 2 1 2 = = =

Pick 2 points on the line and find the slope Y (x2, y2) (12,8) rise run Slope formula y2 – y1 x2 – x1 1 2 (8,6) (x2, y2) (x1, y1) (2,3) 3 – 2 2 - 0 1 2 Pick 2 different points on the line and find the slope of those points (0,2) (x1, y1) X rise run Slope formula y2 – y1 x2 – x1 2 4 1 2 8 – 6 12 - 8 2 4 1 2