Question

The three angles of a quadrilateral are 60° , 80° and 100° . Find the fourth angle ​

Answer 1

Answer

Sum of four angle =360°

X+60°+80°+100°=360°

X+240°=360°

X =360°-240°

X = 120°

Fourth angle = 120°

Hope it's help you

Answer 2

Given

The three angles of a quadrilateral are 60° , 80° and 100°

Find

the fourth angle

Solution

• We know that the sum of measure of three angles of quadrilateral=360°

__________________________

Therefore x+60°+80°+100°=360°

Therefore x+140°+100°=360°

Therefore x+240°=360°

Therefore x=360°-240°

Therefore x=120°

_________________________

Hence the fourth angle is 120°