Question

give me answer of question7

Answer 1

angleAOC + angle BOC = 180 ( it's straight line)
2x - 10 + 3x + 20 = 180
5x + 10 = 180
5x = 170
X = 170/5
x = 34 degree
Angle AOC = 2*34 -10 = 68 - 10 = 58 degree
Angle BOC =3*34-20= 92- 20=72

Answer 2

Hello dear friend !

Here is your answer :


7. Solution.

In the given figure,

AOB is a straight line, so

<COA + <COB = 180°

=> 2x-10° + 3x+20° = 180°

=> 5x+10° = 180°

=> 5x = 170°

=> x = 34°