Answer:
The answer to your question is below
Step-by-step explanation:
HF = HE = 5
GE = 2HE = 2(5) = 10
GF = EF = 7.1
m∠GHF = 90° because m∠HGF = 45° and m∠HFG = 45° and
the sum of the internal angles in a triangle equals 180°.
m∠DEF = 90° the sum of the internal angles in a square equals 360°
then, 360/4 = 90°.
m∠DGH = 45° because the angle ∠DGF was cut in two equal angles.
