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 Angle-Angle (AA- Similarity):  If two angles of one triangle are congruent to two corresponding angles in another triangle, then the triangles are similar.

Similar Triangles: Determine proportions comparing the side lengths of similar triangles.

Side Splitter: Find a relationship between sides in two triangles.

Altitude to the Hypotenuse: Investigate the relationship between sides of right triangles when an altitude is drawn to the hypotenuse of a right triangle.

Casting Shadows: Use a man's shadow to determine his distance from a tree.