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An octagon (like a STOP sign).
zero. Stop signs are octogons. if you are counting the letters too. then there is 14
if they cross with 90 degree angles.+(it will look like a plus sign.)
yes it does.Everyone knows that.
The angles are obtuse angles. The stop sign is octagonal in shape. Assuming it is a regular octagon, then: exterior_angles = 360o ÷ 8 = 45o -> interior angle = 180o - 45o = 135o