Examveda

A1 and A2 are two regular polygons. The sum of all the interior angles of A1 is 1080°. Each interior angle of A2 exceeds its exterior angle by 132°. The sum of the number of sides A1 and A2 is:

A. 22

B. 24

C. 23

D. 21

Answer: Option C

Solution (By Examveda Team)

A1 and A2 are 2 regular polygon
Sum of internal angle of A1 = 1080°
(n - 2) × 180° = 1080°
(n - 2) = 6
n = 6 + 2 = 8
Internal angle of each A2 is grater than exterior angle by 132°
I + E = 180°
I - E = 132°
2I = 312°
I = 156°
E = 24°
n $$ = \frac{{{{360}^ \circ }}}{{{\text{Each Angle}}}} = \frac{{{{360}^ \circ }}}{{{{24}^ \circ }}} = 15$$
Sum of side of A1 and A2 = 15 + 8 = 23

This Question Belongs to Arithmetic Ability >> Mensuration 2D

Join The Discussion

Related Questions on Mensuration 2D