Question

△WXY is similar to △ZWY. Calculate ZY to the nearest tenth? (Picture included)

Answer 1

`ZY = **4.9 ** cm`

Explanation:

`(WX)/(ZW )= (XY)/(WY )= (YW)/(YZ)`

`cos Y = (WY)/(XY) = 7/10`

Also `cos Y = (ZY) / (WY) = (ZY) / 7`

`:.(ZY)/7 = 7/10`

`ZY = (7*7)/10 = 4.9`