Angles DEF and GEH have the following measures:

m∠DEF = (x − 18)°, m∠GEH = (3x + 4)°

Part A: If angle DEF and angle GEH are complementary angles, find the value of x. Show every step of your work. (4 points)

Part B: Use the value of x from Part A to find the measures of angles DEF and GEH. Show every step of your work. (4 points)

Part C: Could the angles also be vertical angles? Explain. (4 points)