Question

. If the angles of the quadrilateral are (x-15)o , xo , (x+20)o and (2x+5)o , then find the greatest angle of the quadrilateral.

Answer 1

Answer:

145°

Step-by-step explanation:

sum of the angles of a quadrilateral is = 360°

then,

(x-15)+x+(x+20)+(2x+5) = 360

5x+10=360

5x=350

x= 70

then the angles are

x-15= 70-15= 55°

x=70°

x+20= 70+20= 90°

2x+5= 2*70+5= 145°

then the greatest angle is 145°