Question

If the sum of interior angles of a polygon in equal to 20 right angles,then the number of sides of the polygon is?

Answer 1

Answer:

12 sides

Step-by-step explanation:

sum of interior angles of a polygon = 20 * 90 = 1800

SUM OF INTERIOR ANGLES = ( NO. of sides - 2)180

1800 = (n-2)180

1800÷180 = n-2

10=n-2

n = 10+2 = 12

Answer 2

Answer:

Concept: applying the formulae of sum of interior angles

GIVEN: If the sum of interior angles of a polygon in equal to 20 right angles

TO FIND: number of sides a polygon has

Step-by-step explanation:

as we know a right angle is 90°.

so sum of interior angles of a polygon = 20 * 90 = 1800

now, sum of interior angles = ( NO. of sides - 2)*180

so, 1800 = (n-2)*180

so, 1800/180 = n-2

so,n-2=10

so, n = 10+2

or, 12.

therefore, the number of sides of polygon is 12.

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