TRIG Circle Geometry 2
 perpendicular bisector ? chord ? perpendicuar ? radius ? tangent ?  α 2α ? α ? β π-γ ? γ π-β ? ½δ ? 90° δ π-½δ ? ½π ? π-δ ? 3 ? ⅓π ½π ? 3 φ 4 5 ? ½π-φ ? r ? 90° ? α ½r2α ? b ? ½br - ½r2α ? r ? 90° ? α ½r2α ? b ? br - r2α ? 90-α ? r ? √( c2-(R-r)2 ) ? α c R-r ? R ? 90+α ? |
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