## Introduction: Similar polygons

In this Gizmo, you can study similar figures of many shapes and sizes. You will be given a pair of similar shapes. You can resize, rotate, and reshape the figures. Whatever you do to them, they will remain similar to each other.

## Assessment Questions

1. Suppose you have a pair of similar triangles and and are corresponding sides. If AB = 6 and the scale factor is 3, what is EF?
1. 3
2. 6
3. 9
4. 18
2. Suppose you have ΔABC with AB = 4, BC = 5, and CA = 6, and also ΔEFG with EF = 400, FG = 500, and GE = 600. Are these triangles similar, and if so, what is the scale factor?
1. Similar, scale factor = 10
2. Similar, scale factor = 100
3. Similar, scale factor = 1000
4. Not similar
3. True or false: All squares are similar to all other squares.
1. True
2. False
4. Suppose you have trapezoid ABCD and trapezoid EFGH, and they are similar, with a scale factor of 2. If the angle measures of ABCD are 80°, 80°, 100°, and 100°, what are the measures of the angles in EFGH?
1. 40°, 40°, 50°, and 50°
2. 80°, 80°, 100°, and 100°
3. 160°, 160°, 200°, and 200°
4. Cannot be determined

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