The sum of 16 and 18 is 34.
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93
it is normally all obtuse. * * * * * The sum of the interior angles of an n-gon is (n-2)*180 degrees. Since n = 18, the sum is 16*180 degrees. So each angle is 16*180/18 = 160 degrees.
The Answer is 15+17=32
69 + 18 = 67
sum of interior angles = (sides - 2) * 180 = 16 * 180 = 1800 + 1080 = 2880 degrees