Question

please solve........ ​

Answer 1

Answer:

<AOC + <COD + <BOD = 180°

(3x - 10)° + (50°) + (x + 20)° = 180°

4x + 60° = 180°

4x = 120°

x = 120°/4

x = 30°

so, subtitution x = 30° to <AOC

<AOC = 3x - 10° = 3(30)° - 10 = 90° - 10 = 80°

The answer is 80° (D)

Answer 2

Answer:

3x-10 +50+x+20 = 180°

4x + 60 = 180°

4x = 120

x = 30°

angle AOC = 3( 30 ) -10

= 90-10

= 80°