Question

3 angles of quad are in ratio 3:5:7.the diff of least and great angle is 76.find all the angle of quad?

Answer 1

3x-7x=76
4x=76x
x=19
so angles =3×19=57
5×19=95
7×19=133
third=360-(57+95+133)
360-285
75

Answer 2

$7x - 3x = 76 \\ 4x = 76 \\ x = \frac{76}{4} = 19 \\ therefore \: 1 \: angle = 3 \times 19 =57 \\ 2 \: angle = 5 \times 19 = 95 \\ 3 \: angle = 7 \times 19 = 133 \\ now \: \: 133 + 95 + 57 + y = 360 \\ y = 360 - 295 = 65$