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GeoGebraGeoGebra Classroom

Missing lengths in similar triangles

DIRECTIONS: 1. ∆ABC and ∆DEF are similar triangles. 2. Move the red points to change the shape of the two triangles. 3. Create proportions to find the values for the missing lengths a and b and then solve the proportions. 4. Use the green and blue sliders to reveal a proportion and the answer.