Answers

2016-01-19T22:46:56+08:00
2+3+4 is equal to 9.

180 is the sum of all angles, so divide 180 by 9. it is equal to 20.

2 times 20 is 40, 3 times 20 is 60, and 4 times 20 is 80, and those are the measure of the angles.
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