Answer:
D for both
Explanation:
9: The upper angles in the trapezium will both be 180 - 55 = 125 degrees as they are co-interior angles.
Each interior angle of a regular octagon is equal to 180(8-2)/8 = 135 degrees.
Therefore x = 360 - 135 - 125 = 100 degrees.
I’ve already done Q10 before but the polygon has 5 vertices then it has 5 sides so the sum of its interior angles is 180(5-2) = 540 degrees.