Question

the measure of three angles of a quadrilateral are 100° , 80° , 120° . find the measure of the fourth angle?

Answer 1

Answer:

60°

Step-by-step explanation:

let fourth angle be x

sum of angles of quadrilateral=360

100°+80°+120°+ x=360°

300°+x=360°

x=360°-300°

x=60°

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Answer 2

Answer:

Hey friend,

Here is the answer you are searching for,

Let the fourth angle be x°,

=> 4 angles = 100°,80°,120°,x°

Sum of all angles in a quadrilateral = 360°

=> 100°+80°+120°+x° = 360°

=> x° = 360° - (100°+80°+120) = 360°-300° = 60°

Therefore,

Fourth angle = 60°

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