Question

What is the value of x?

20
35
60
70

Answer 1

The given angles are =

(x+40)° and 3x°

As the given angles are opposite to each other on the intersecting lines, so they are vertical angles. These are congruent or equal.

So, $x+40=3x$

$2x=40$

$x=20$

Hence x = 20°

The given angles are =

(x+40) = 20+40 =60°

3x = 3*20 =60°