equations

Circles: A =π r 2 : d=¿ πd Polygons: S i =( n −2) 180 : diag= n ( n −3) 2 Alt-Hypt: h 2 = xy : b 2 = xc : a 2 = yc Pythagorean Theorem: a 2 +b 2 =c 2 Quadratic: −b ± √ b 2 − 4 ac 2 a Slope: y 2 − y 1 x 2 − x 1 Midpoint: ( x 1 + x 2 2 , y 1 + y 2 2 !istance "ormula: x 2 − x 1 ¿ ¿ ¿ √ ¿ " amilies o# T riangles: $%-&%-'%: - √ 3 - ) *+-*+-'%: - - √ 2 $-*-+: +-)-$: -)*-)+: .-+- T rig: sin/01H cos/A1H ta n/01A

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Circles: d Polygons: : Alt-Hypt: Pythagorean Theorem: Quadratic: Slope: Midpoint: (,)Distance Formula: Families of Triangles:30-60-90: x - x- 2x45-45-90: x - x - x 3-4-5: 5-12-13: 7-24-25: 8-15-17Trig: sin=O/H cos=A/H tan=O/A

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