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Unformatted text preview: Every line segment has exactly one midpoint. Theorem. Every angle has exactly one bisector. Theorem. Vertical angles are congruent. Theorems. SAS, ASA, SSS triangle congruences. Theorems. Isosceles Triangles Theorem. Two angles of a triangle are congruent if and only if the opposite sides are congruent. Theorem. In a triangle larger side is opposite larger angle and larger angle is opposite larger side. Triangle Inequality Theorem. The sum of lengths of two sides of a triangle is greater than the length of the third side. Exterior Angle Theorem. An exterior angle of a triangle is greater than either of the two nonadjacent interior angles....
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- Spring '09