Question

In the triangle, suppose that m

Answer 1

12

Explanation:

angle E is 90º so the other two angles must sum to 90º

4x-15+3x+21=90

7x+6=90

7x=84

x=12º

m∠C=4(12)-15=48-15=33º

m∠D=3(12)+21=36+21=57º