Question

Three angles of a quadrilateral are 60, 70 and 80°. Find the fourth angle​

Answer 1

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. Forth angle=360-260=100.

Answer 2

Answer:

quadrilateral have an angle 360°

so let the fourth angle be x

Step-by-step explanation:

60 + 70 +80 + X = 360

on solving you will get

X = 360-210

X = 150°

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