Answer:
4x+12+2x+8
4x+2x=6x. 12+8=20
=6x+20
22 cm
Step-by-step explanation:
D = 90°
E = 147°
F = 33°
E:
E is 147°, because it is vertical to the angle 147°
F:
F is 33°, because 147* is its supplementary angle, or angles that add up to 180°
D:
D is worth 90°, because its supplement is worth 90°
-Chetan K
