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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