Someone please help me with my geometry!!

1.How many sides are there on a convex polygon if the sum of the interior angles is 3240?

2.The sum of the angles in a convex 10-sided polygon is:

3.What is the sum of the interior angles of a convex nonagon?

4.If four angles of a convex pentagon measure 120°, 93°, 108°, and 101°, find the measure of the fifth angle.

Answer #1
  1. 20
  2. 1440
  3. 1260
  4. 118
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