Answer:
a) (2x+9) + (3x-4) + 36 = 180
b) x = 27.8
c) 79.4°
Explanation:
a) (2x+9) + (3x-4) + 36 = 180
This is because all 3 angles of a triangle equal to 180 degrees.
b) Firstly add like terms
5x + 41 = 180
Subtract 41 from both sides.
5x = 139
Divide 5 on both sides.
x = 27.8
c) <GTN = 3x-4
Plug in x = 27.8
3(27.8)-4 = 79.4
<GTN is 79.4 degrees