Aschool wants to build a rectangular playground that will have a diagonal length of 75 yards. how wide can the playground be if the length has to be 30 yards?

A rectangle has two diagonals. Each one is a line segment drawn between the opposite vertices (corners) of the rectangle. By using the Pythagorean Theorem, we can calculate the width. We do as follows:

c^2 = a^2 + b^2
a = sqrt( c^2 - b^2 )
a = 68.74 yards

We should use Pythagorean's theorem. a² + b² =c²  

Step-by-step explanation:

a² + b² = c²

75² = 30² + b²

5625 = 900 + b²

5625 - 900 = b²

4725 = b²

=

68.73863542 = b

b = 68.74

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The best estimate would be about 1 foot

9/12 is the answer because 3/4 times 3 each is 9/12