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Supplementary Angles Linear Pair Complementary Angles Vertical Angles Isosceles Triangle Theorem Two angles whose measures add up to 180° 1 2 ____+____=_____ Two angles that are side-by-side, share a common vertex, share a common ray, & create a straight line 1 2 ____+____=_____ Two angles whose measures add up to 90° 1 2 _____+_____=______ The nonadjacent angles formed by two intersecting lines. (They’re across from each other.) The base angles of an isosceles triangle are congruent 1 2 3 4 ____≅____ 1 2 ____≅____ ____≅____ Alternate Interior Angles Alternate Exterior Angles Corresponding Angles Consecutive Interior Angles 2 1 The angles on opposite sides of the transversal and inside the parallels ≫ 4 3 5 6 8 7 ≫ ____≅____ 2 1 The angles on opposite sides of the transversal and outside the parallels ____≅____ ≫ 4 3 5 6 8 7 ≫ ____≅____ 2 1 The angles at the same location but at different intersections ≫ 4 3 5 6 8 7 ≫ ____≅____ ____≅____ ____≅____ ____≅____ 2 1 The angles on the same side of the transversal and inside the parallels ____≅____ 3 ≫ 4 5 6 7 8 ≫ _____+_____=______ _____+_____=______