Question

solve the Question 10
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Answer 1

Answer:

let the unknown be x

5x+4x=180°(sum of adjacent angles)

9x=180°

x=180/9

x=20°

5x=5×20=100°

4x=4×20=80°

Step-by-step explanation:

hope this helps u

Answer 2

Answer:

let the ratio be x, then

5x+4x=180° (sum of anlges on a line)

=》9x=180°

=》x=180°/9

=》x=20°

hence, angle1=5x=5×20°=100°

and, angle 2 =4x=4×20°=80°

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