Polygons Similar and Congruent Lesson 18 Power Up D Page 120
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
Vocabulary Vertex: where 2 sides meet, corner Congruent: same shape and size, ≅ Similar: same shape, ~ Corresponding parts: angles and sides that match exactly
Similar and Congruent Which triangles are congruent? Which triangles are similar? ∠ A corresponds to which angle? AC corresponds to which segment?