Question

4. If the angles of a quadrilateral are x°, (x - 10). (x + 30) and 2xº, then the greatest angle is:​

Answer 1

Sum of angles of quadrilateral are 180°

so,

x°+(x–10)°+(x+30)°+2x°=360°

5x°+20°=360°

5x=340°

x°=68

Answer 2

Answer:

x+X-10+x+30+2x=360

5x+20 = 360

5x=340

x = 68

The greatest angle=2x=136 degree