The school has a rectangular playground. The ratio of the length of the playground to its width is 3 : 4. The length of the playground is 45 yards. Find the
perimeter and area.

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125.28

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  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q