Question

find the value of the unknown angles in the following figure​

Answer 1

Answer:

x+3x+4x+80=360

8x=360-80

x=280/8

x=35

value of all angles

x=35

3x=3.35=105

4x=4.35=140

Answer 2

3x+4x+80°+x=360°(sum of all angles is 360°)

8x+80°=360°

8x=360°-80°

8x=280°

x=280°/8

:.x=35°

:.3x=3*35°=105°

:.4x=4*35°=140°