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### 36 Cards in this Set

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 area of a parallelogram A = bh where: b is the base h is the height Perimeter of a square P = 4s Perimeter of a rectangle P = 2L + 2W Perimeter of a triangle P = s1 + s2 + s3 area of a triangle A = ½ bh where: b is the base h is the height Circumference of a Circle C = pi x d or C = 2pi x r Area of a Square A = s x s area of a trapezoid A = ½ h(b₁ + b₂) where: b₁ and b₂ are the bases h is the height chord of a circle diameter of a circle radius of a circle central angle circumference of a circle the distance around the circle C = πd = 2πr area of a circle A = πr² where r is the radius arc major arc minor arc semicircle Pythagorean Theorem Special Triangle: 45°-45°-90° Special Triangle: 30°-60°-90° sin A cos A tan A solve a triangle find the measures of all the sides and all angles of a triangle inscribed angle intercepted arc If an inscribed angle intercepts a semicircle, then... tangent If a line is tangent to a circle, then... If two segments from the same exterior point are tangent to a circle, then... secant If a secant and a tangent intersect at the point of tangency, then... If two secants, a secant and a tangent, or two tangents intersect in the exterior of a circle, then... If two secant are drawn to a circle from an exterior point, then... If a tangent segment and a secant segment are drawn to a circle from an exterior point, then...