# Is It Possible to Have a Polygon, Whose Sum of Interior Angle Is: 7 Right-angles - Mathematics

Sum

Is it possible to have a polygon, whose sum of interior angle is: 7 right-angles

#### Solution

Let no. of sides = n

Sum of angles = 7 right angles = 7 x 90 = 630°

(n – 2) x 180° = 630°

n – 2 = 630/180

n – 2 = 7/2

n = 7/2 + 2

n = 11/2

Which is not a whole number. Hence it is not possible to have a polygon, the sum of whose interior angles is 7 right-angles.

Concept: Sum of Angles of a Polynomial
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 16 Understanding Shapes
Exercise 16 (A) | Q 4.3 | Page 180