Question

the average of 3 angles of a quadrilateral which are in the ratio of 2;5;4 is 77.Find all the angle of the quadrilateral .

Answer 1

Answer:

let common factor be x

(2x+5x+4x)/3=77

11x = 77 × 3

x = 21

1st angle = 42⁰

2nd andle = 102⁰

3rd angle = 84⁰

4th angle = 360 -(42+102+84)

= 360⁰-228⁰

= 132⁰