Question

find the value of x​

Answer 1

Answer:

The value of all angles in a triangle is 180°.

A + B + C = 180°

=> 70° + 30° + x° = 180°

=> 100° + x° = 180°

=> x° = 180° - 100°

=> x° = 80°

Answer 2

Angle D = angle A = 30
( angle of same segment)
In triangle BDC
70+ 30+ x = 180 (angle sum property)
100 + x = 180

X = 180 - 100
X = 80