If ∆DEF ≅ ∆XYZ, XZ = 12 and DF is 18 less than 3XY. Find XY.

Answer 1

Hi,

If ΔDEF ≅ ΔXYZ, then DF ≅ XZ, and DF = XZ.

And DF = 3XY - 18 and XZ = 12.

DF = XZ

3XY - 18 = 12

+18 +18

3XY = 30

3 3

XY = 10

I hope this helps, Joe.