Question

If 4 x -10 degree and 3 x -20 degree supplementary to each other find angles

Answer 1

.

then angles

1st angle

$= 4x - 10 \\ = 4 \times 30 - 10\\ = 120 - 10 \\ = 110$

2nd angle

$= 3x - 20 \\ = 3 \times 30 - 20 \\ = 90 - 20 \\ = 70$

angle 3rd and 4th are vertically oppositie angles