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 The Triangle
 The Quadrilateral
 The Polygon

The Circle
 01 Arcs of quarter circles
 02 Area bounded by arcs of quarter circles
 03 Area enclosed by pairs of overlapping quarter circles
 04 Four overlapping semicircles inside a square
 05 Three identical cirular arcs inside a circle
 06 Circular arcs inside and tangent to an equilateral triangle
 07 Area inside the larger circle but outside the smaller circle
 08 Circles with diameters equal to corresponding sides of the triangle
 09 Areas outside the overlapping circles indicated as shaded regions
 10 Swimming pool in the shape of two intersecting circles
 11  Area inside a circle but outside three other externally tangent circles
 12  Circular sector inscribed in a square
 13  Length of Belt Connecting Two Pulleys
 14  Area the goat can graze inside a right triangular lot
 Angle between two chords
 Area of Regular FivePointed Star
 Area of Regular SixPointed Star
 Circle Tangent Internally to Another Circle