Using the formula, (n - 2) × 180°, the sum of measures of interior angles of a convex 70-gon is: 12,240°
Recall:
Thus, a convex 70-gon has 70 interior angles (n = 70).
Therefore, the sum of the measure of all the interior angles of the 70-gon would be solved as follows:
(n - 2) × 180°
(70 - 2) × 180°
68 × 180°
12,240°
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