Q1 F of 59 Page 195

Let’s write the sum of the measurement of the interior angles of the following polygons:

a polygon with 12 sides.


So let us substitute n = 12 in the above formula.

Sum of interior angles is given as = (2 × 12 – 4) × 90


= (24 – 4) × 90


= 20 × 90


= 1800°


More from this chapter

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1 D

Let’s write the sum of the measurement of the interior angles of the following polygons:

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 1 E

Let’s write the sum of the measurement of the interior angles of the following polygons:

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 2

The measurement of three angles of a quadrilateral are 104.5°, 65°, 72.5° respectively. Let’s write the measurement of the fourth angle.

 3

The measurement of four angles of a pentagon are 65°, 89°, 132°, 116° respectively. Let’s write the measurement of the fifth angle.