What is the value of a?
Draw a line from W to Y this will be the hypotenuse of a rt triangle length = sqrt (4^2 + 4^2) = sqrt 32
this line also makes YWZ a right riangle with hypot 9 and one leg WY = sqrt32 ....find other leg
9^2 = (sqrt32)^2 + a^2
81-32 = a^2 = 49 a = 7