Question

Please tell me the solution of this question

Answer 1

Step-by-step explanation:

Let the three angles be x, 5x and 7x.

=> 100 + x + 5x + 7x = 360°

=> 13x = 360 - 100

=> 13x = 260

=> x = 260/13

=> x = 20°

=> 5x = 5 × 20 = 100°

=> 7x = 7 × 20 = 140°

Therefore, the measure of the other three angles of the quadrilateral are 20°, 100° and 140°.

Answer 2

Answer:

20, 100 and 140

Step-by-step explanation:

here,

let the ration 1:5:7 be x, 5x and 7x

now,

x+5x+7x+100= 360

or, 13x= 360 - 100

or, 13x = 260

or, x= 260/13

or, x= 20

then,

1:5:7= 20:5*20:7*20

      = 20:100:140