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A rectangle = LW

If the diagonal of length of 10 ft makes a 55⁰ angle with length L, then the length of width W equals to 10 sin 55⁰ ft, and the length of L equals to 10 cos 55⁰ ft. So that

A = LW = (10 sin 55⁰ ft)(10 cos 55⁰ ft) ≈ 47 ft2

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Q: Find the area of a rectangle whose diagonal is 10 feet long and makes a 55 degree angle with one of the sides?
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