Question

On a piece of paper, use a protractor to construct right triangle DEF with DE=4 in. , m∠D=90° , and m∠E=45° . What statement is true about the triangle? DF=4 in. DF=2 in. EF=7 in. EF=4 in.

Answer 1

The truth is DF = 4 in.
Because,
Angel F
= 180-(90+45)
= 45
=angel E

Then DE = DF