Q1 D of 59 Page 195

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

octagon


For a octagon we know that it has eight sides.

So let us substitute n = 8 in the above formula.


Sum of interior angles is given as = (2 × 8 – 4) × 90


= (16 – 4) × 90


= 12 × 90


= 1080°


More from this chapter

All 59 →
1 B

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

hexagon


 1 C

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

heptagon


 1 E

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

Decagon


 1 F

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

a polygon with 12 sides.