Question

Use the given area to find XY. A. 8 cm B. 12 cm C. 16 cm D. 24 cm

Answer 1

The answer is XY=2*DE=2*4=8cm, in summary, eight cenimeters.

Answer 2

A

Explanation:

Since the triangles are similar then the ratio of corresponding sides = a : b

and ratio of areas = a² : b²

Here the ratio of areas = 7 : 28 = 1 : 4, hence

ratio of sides =
`√(1)` :
`√(4)` = 1 : 2

Hence

XY = 2 × DE = 2 × 4 = 8 cm