Base Angles & Exterior Angles

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Presentation transcript:

Base Angles & Exterior Angles

Base Angles If 2 angles in a triangle are congruent, then the sides opposite them are congruent.

Solve for x. 2x + 25 = 7 2x = -18 12 x = -9

Base Angles If 2 sides in a triangle are congruent, then the angles opposite them are congruent.

Solve for x. 6x + 1 = 55 6x = 54 3 x = 9

Exterior Angle Theorem The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles of the triangle.

Solve for x. 3x - 10 = x + 15 + 25 2x = 50 x = 25