- 1-800-665-6601
- info@tutorpace.com

In the above figure angle 1 and 3 & angle 2 and 4 are vertical opposite angles. It is important to note that these angles are always. That is angle 1 = angle 3, and angle 2 = angle 4.

This is very important part of the geometry. One can find unknown variable especially unknown angles with this concept knowledge.

We have to find the value of angle 3 and angle 4.

For the same we know that vertical opposite angles are equal

Since Angle 3 and Angle 120 degrees are vertical opposite angles, so they must be equal.

Similarly Angle 4 and 60 degree are vertical opposite angles, so they must be equal.

In this we have evaluated two unknown angles.

We have to find the value of angle 3 and angle 4

For the same we know that vertical opposite angles are equal

Since Angle 3 and Angle 100 degrees are vertical opposite angles, so they must be equal.

Similarly Angle 4 and 80 degree are vertical opposite angles, so they must be equal.