Question

sum of three angles of a quadrilateral is 5 times the fourth angle find the fourth angle

Answer 1

let the fourth angle be x , now, x+ 5 x = 360 ( sum of a quad.). therefore, 6 x = 360. x = 360/6. x= 60

Answer 2

Answer ;

60 degree

step by step explanation;

Let  'x' , 'y' , 'z' & 'a'  be 1st , 2nd , 3 rd & 4th  angle

So, x + y + z     =   5a

Sum of all angles of a quadrilateral = 360 deg

x + y + z + a = 360 deg

5a + a = 360 deg

6a  = 360 deg

a =360 / 6

a = 60 degrees

Therefore , 4th angle is 60 degree .