+407 Find the length of the missing side of the trapezoid below.
Give your answer in simplified form.
+129852 Drop a perpendicular from the top left edge of the figuer to the base
This forms a right triangle with a hypotenuse of 7 and a leg of (8 - 5) = 3
The missing side = the other leg = sqrt [ 7^2 - 3^2 ] = sqrt [ 49 - 9 ] = sqrt (40) =
sqrt [ 4 * 10) = sqrt 4 * sqrt 10 = 2 sqrt 10
