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Transcript
Geometry 7-4 A Postulate for Similar Triangles Angle-Angle Similarity (AA ) If two angles of one triangle are congruent to two angles of another triangle, then the Geometry notes 7.5 page 264 1-5 classroom exercises; and page 266 1-6 written exercises Theorems for Similar Triangles SAS Similarity Theorem – If an angle of one triangle is congruent to an angle of another triangle and the sides including those angles are in proportion, then the triangles are similar. SSS Similarity Theorem – If the sides of two triangles are in proportion, then the triangles are similar. Notes 7.6 Geometry Proportional Lengths Triangle Proportionality Theorem If a line parallel to one side of a triangle intersects the other two sides, then it divided those sides proportionally. If three parallel lines intersect two transversals, then they divided the transversals proportionally. If a ray bisects an angle of a triangle, then it divides the opposite side into segments proportional to the other two sides.