Question

angles of a quadrilateral is 180° the others two angles are in the ratio of 2:7. find these angles.​

Answer 1

Answer:

suppose a number is x

so , x×2=2x and 7×x =7x

2x+7x=180°

9x=180°

so,x=180°÷9

x=20

first angle is 2×20=40

and second angle is 20×7=140

Answer 2

Answer:

the two angles are 40°and 140°

Step-by-step explanation:

sum of opposite angles of the quadrilateral is 180°

2x+7x=180°

9x=180°

x=180°/9

x=20°

2x=2×20=40°

7x=7×20=140°

the two angles are 40°and 140°

if you want to check the answer

1st method:

it is given that the two angles are in the ratio 2:7

40:140

= 40÷20/140÷20

=2/7

2nd method:

sum of opposite angles of the quadrilateral is 180°

40°+140°=180°

hope it will help you.

mark the answer as brainliest answer.