5). (2 points each) Find X for each of these triangle problems. First write down the equation for the sum of the angles in a triangle, then solve it. I will write the first equation for you.
a).
Equation: 2X + X + 90 = 180
X = _______
b).
Equation:______________________
X = _______
c).
Equation:______________________
X = _______
d).
Equation:______________________
X = _______