Question

The measure of these three angles of a quadrilaterals
is 30°, 70° and 100°. Find out the measurement
of fourth angle.​

Answer 1

Step-by-step explanation:

Sum of measures = 360 degrees

Fourth angle = 360-200 degrees = 160 degrees

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Answer 2

The total measure of interior angles of a quadrilateral is 360°

30°+70°+100°+x°=360°

100°+100°+x°=360°

200°+x°=360°

x°=360°-200°

x°=160°

Verification

160°+100°+30°+70°

260°+100°

360°

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