1. Polygons Similar and Congruent
Lesson 18 Power Up D Page 120

2. Vocabulary
Polygon: closed, flat with 3 or more line segments, same number of sides as angles
Regular polygon: same length sides, same size angles
Irregular polygon: different length sides and different size angles

3. Vocabulary Vertex: where 2 sides meet, corner
Congruent: same shape and size, ≅
Similar: same shape, ~
Corresponding parts: angles and sides that match exactly

6. Similar and Congruent Which triangles are congruent?
Which triangles are similar?
∠ A corresponds to which angle?
AC corresponds to which segment?