Question

two angle on a straight line are in ratio 2:7 the find the angles
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Answer 1

Step-by-step explanation:

straight line = 180degrees = 2+7 = 9 parts

9 parts = 180 degrees

1 part = 20 degrees

2:7 = 40 degrees: 140 degrees

Answer 2

Answer:

straight line = 180 °

2:7 can written as 2x 7 x

sum two angles = 180 ( straight line too)

2x + 7x = 180

9x=180

x = 180÷ 9 = 20

x= 20

angles are

2x =2× 20 = 40°

7x = 7×20 140°