geometry

A rectangle has a diagonal 20 inches long that forms angles of 60 and 3o with the sides. Find the perimeter of the rectangle.

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1. the ratio of sides of a 30° - 60° - 90° triangle is
1 : √3 : 2

looks like the hypotenuse of your triangle is 10 times the basic ratio value.
so the other sides must be ........

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