It would have been far simpler and quicker to use your calculator. But, since you seem unable to do so, the answer is 248.
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278
8 + 16 + 40 + 48 + 72 + 80 + 120 + 144 + 240 + 360 + 720 = 1848
(180°-x) + (90°-x) = 240°270° - 2x = 240°30° = 2x15° = xThe measure of the angle is 15°.The supplement is 165°, the complement is 75°, and their sum is 240°.
8 / 240 = 0.033333
20 + 12 = 32 20 x 12 = 240