Question

find the value of x ​

Answer 1

Answer:

Sum of all angles = 180°

30°+40°+x = 180

70°+x = 180

70°x.= 180°

= 25 °

25° is answer.

Answer 2

STEPWISE SOLUTION :-

Construction :- Join OA.

Solution:- Angle A = 30° + 40° = 70°

Reason:- Base angles of an isoscale triangle are equal.

Therefore X = 2 × angle A

= 2 × 70°

= 140°