Two lines cross. One angle is (2x + 30) deg and the adjacent angle (its linear pair) is (x) deg. Find the measure of the vertically opposite angle of the (2x+30) deg angle.

Question

Accepted Answer

130. (2x + 30) + x = 180 gives 3x = 150, x = 50. So (2x + 30) = 130°, and its vertically opposite angle is also 130°.

Two lines cross. One angle is $(2 x + 30)$ deg and the adjacent angle (its linear pair) is $(x)$ deg. Find the measure of the vertically opposite angle of the $(2 x + 30)$ deg angle.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Linear Pair and Vertically Opposite Angles practice

Two lines cross. One angle is (2x+30) deg and the adjacent angle (its linear pair) is (x) deg. Find the measure of the vertically opposite angle of the (2x+30) deg angle.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Linear Pair and Vertically Opposite Angles practice

Two lines cross. One angle is $(2 x + 30)$ deg and the adjacent angle (its linear pair) is $(x)$ deg. Find the measure of the vertically opposite angle of the $(2 x + 30)$ deg angle.