(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Concepts of Geometry

(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Concepts of Geometry

1. Find the number of sides of a regular polygon whose interior angle is 140°.

(a) 8
(b) 9
(c) 7
(d) 10

2. Find the sum of interior angles of a regular polygon of 15 sides.

(a) 2340°
(b) 1800°
(c) 2520°
(d) 2160°

3. How many sides has a regular polygon whose interior angle is 11 times its exterior angle ?

(a) 21
(b) 24
(c) 18
(d) 26

4. Two angles of a regular polygon are 100° each and each of the remaining angles is 130°. Find the number of sides of the polygon.

(a) 5
(b) 6
(c) 4
(d) 7

5. The ratio of the measure of an interior angle of a regular nonagon to the measure of each of its exterior angles is :

(a) 3 : 5
(b) 2 : 7
(c) 1 : 4
(d) 4 : 7

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