Permachart - Marketing Reference Guide: Circumscribed Circle, Trapezoidal Rule, Quadrilateral

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4 Jun 2015
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Note: for the following figures, c = circumference and s = arc length. A + b + c + d = 360 . Perimeter a + b + c + d a p. Theorem: diagonals of a quadrilateral with consecutive sides a, b, c, and d are perpendicular if and only if a2 + c2 = b2 + d2. A = b = c = d = 90 . A + b + c + d = 360 , a||b. Area bh = absina = absinb b b p b a b c q. R s h r b h b s segment (cid:13)a (cid:13) Triangles: for the following triangles, s = semiperimeter = 1 2(a + b + c), r = radius of inscribed circle, r = radius of circumscribed circle. R s s a s b s sin.

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