Question

Find the fourth angle if the three angles of a quadrilateral are 80°,70° and 120°

Answer 1

Sum of all angles of a quadrilatileral =360°
80°+70°+ x +120°=360°
x= 360°- (120°+80°+70°)
x= 360° -270°
x= 90°

PLEASE MARK AS BRAINLIEST AND SAY

Answer 2

Sum of four angle of a quadrilateral =360
angle1=80 degrees
angle 2 =70 degrees
angle3=120 degrees
angle4=???



Let ,angle 4 be x
As we know,
sum of angle of quadrilateral =360


=70+80+120 =270 degrees
=360-270=90 degrees

Hence the fourth angle is 90 degrees

Please,mark me as a BRAINIEST