Question

one angle of a triangle is 78° and the other two angles are inthe ratio 7:10. Calculate the two unknown angles of the triangle​

Answer 1

Answer:

let x be common ratio

7x+ 10x + 78 = 180

17x= 180-78

17x= 102

x= 102/17 = 4

7x= 7×4= 28°

10x=10×4= 40°