find the perimeter of rectangle if one side is 12 cm and one diagonal is 31 cm
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A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface. There are two types of spherical mirrors: concave, and convex. These are illustrated in Fig. 68. The most commonly occurring examples of concave mirrors are shaving mirrors and makeup mirrors
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perimeter of rectangle is 81 .17 cm
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