an octagon has three equal angels each of measure 115°. If all the remaining angels have equal measure, find the measure of each of these remaining angels.
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Step-by-step explanation:
The sum of all angles of an octagon is (8-2)*180 = 1080. If 3 angles measure 115 each, it's sum is 345 degrees. So what remains is 735 degrees, which is the sum of the 5 equal angles left. So, 1 angle = 735/5 = 147 degrees.
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