... m∠3 = 180° 3 2 1 – THE GRE QUANTITATIVE SECTION 184 Example: mЄ1 = mЄ3 + mЄ5 mЄ4 = mЄ2 + mЄ5 m 6 = mЄ3 + mЄ2 ■ The sum of the exterior angles of a triangle equal to 360 degrees. Triangles More ... complimentary if the sum of their measures is equal to 90 degrees. 1 2 ∠1 + m∠2 = 90° Complementary Angles m Straight Angle 180° Obtuse Angle Right Angle Symbol – THE GRE QUANTITATI...
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