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Geometry Formulas

Geometry Things to Remember

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Geometry Formulas

Copyright ? Regents Exam Prep Center Geometry ? Things to Remember! Regular Solids: Tetrahedron ? 4 faces Cube ? 6 faces Octahedron ? 8 faces Dodecahedron ? 12 faces Icosahedron ? 20 faces 3-D Figures: Prism: V = Bh Pyramid: 1 3 V Bh= Cylinder: 2V r h?= ; 22 2SA rh r? ?= + Cone: 2 1 3 V r h?= ; 2SA s r r? ?= + Sphere: 3 4 3 V r?= ; 2 24SA r d? ?= = Locus Theorems: Fixed distance from point. Fixed distance from a line. Equidistant from 2 points. Equidistant 2 parallel lines. Equidistant from 2 intersecting lines Polygon Interior/Exterior Angles: Sum of int. angles = 180( 2)n ? Each int. angle (regular) = 180( 2)n n ?

Geometry Formulas

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Geometry Formulas

Formula?s for the exam tangent and secant lines form an angle, then the Exterior angles of a tangent or secant or of 2 tangent lines, then the Two chords intersect then product of the segments of one chord equal the product of the segments of the other chord. Tangent and Secant segments, then the p=perimeter l = slant height
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