Question: Answer these questions about polygons. (a) Explain how triangles are used to find the expression for the sum of the interior angles of a polygon.

Answer these questions about polygons. (a) Explain how triangles are used to find the expression for the sum of the interior angles of a polygon. (b) What is the sum of the interior angles of a 12-sided polygon? Explain your reasoning and show your work.

{Score for Question 2: __ of 6 pain is] 2. In this gure, 44 is an exterior angle to nAUL. {a} Explain why r1144 is equal to the sum of the measures of the Me nonadjacent interior angles. {b} What is r1144 ? Answer: (Score for Question 3: _of 6 points) 3. In this figure, the angle measures of ABC are shown. C 3(x + 2) 35 520 A B (a) What is the value of x? Show your work. (b) What is the measure of angle C? Show your work.

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