Question

Find the value of x.

(a) 170/2°

(b) 2/170°

(c) 170°

(d) 70°

I have been asked this question during an interview.

This intriguing question comes from Sum of Measures of the Exterior Angles of a Polygon in portion Quadrilaterals of Mathematics – Class 8

Answer 1

Correct option is (a) 170/2°

Easiest explanation: Here we will use the property of external angles.

Therefore (x-10)°+x=180°

Therefore x-10+x=180°

Therefore 2x=170

Therefore x=170/2.