Answer:
x=75°
Explanation:
AG`D=90°
FG'D =15 vert. opp.angl
90-15=75
75° = x°
there are 4 right angles
so with the line being linear, the angle on each side is 15°. so you take
90° (right angle) - 15° (the inside angle) = 75°. or the outside angle
do 75 + 15 to check
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