Question

if the value of three angle of a quadrilateral are 60°,70°and 90° calculate the value of 4th angle.​

Answer 1

Answer:

so answer is = 260

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Step-by-step explanation:

So the measure of 4th angle=360-sum of other three angles. Sum of given three angles=60+80+120=260.

Answer 2

So the measure of 4th angle=360-sum of other three angles. Sum of given three angles=60+80+120=260. Forth angle=360-260=100