180 degrees
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There are 225 degrees in 2 and 1/2 right angles
Two right angles add up to 180 degrees because a right angle is 90 degrees
There are 10 right angles of 90 degrees altogether
A square has 2 pairs of right angles and its 4 right angles add up to 360 degrees
A square has 4 right angles that add up to 360 degrees