Question

find the x of the angle ..3x,x,40°​

Answer 1

ANSWER:

x = 35°

SOLUTION:

3x , x , 40°

3x + x + 40° = 180°

( the sum of all angles should be 180° , if it is a triangle or line segment)

4x = 180° - 40°

x = $\frac{140°}{4}$

x = 35°

and the value of 3x is 3 × 35° = 105°

So, 3x + x + 40° = 180°

LHS

= 105° + 35° + 40°

= 180°

LHS = RHS

therefore the value of x is = 35°