A = (3.14) r2 - Area of a circle, C = (3.14) d or C = 2 (3.14) r - Circumference of a circle, A = bh - Area of a parallelogram, A = 1/2 (b1 + b2) h - Area of a trapezoid, Triangle with all equal sides - Equilateral trianlge, Triangle with 2 equal sides - Isosceles triangle, Triangle with no equal sides - Scalene, Angles that add up to 90 degrees - Complementary Angles, Angles that add up to 180 degrees - Supplementary Angles, Angles right next to each other - Adjacent Angles, Angles that are congruent and across from each other - Vertical Angles,

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