To find the interior angle of any regular polygon you can use the formula

where n is the number of sides
So,

The measure of an interior angle in a regular octagon is 135
Answer:
C - The failure was a starting point for a buildup of aggression around the world.
Step-by-step explanation:
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1 1/2 or 3/2 because there is 4 more than 8 which is a half.
3/4. Keep change flip. 1/2 x 3/2 = 3/4