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The three angles of a quadrilateral are 60°,80° and 120° find the fourth angle?

1 Answer

2 votes

Answer:

Explanation:

Angles in a quadrilateral add to 360°. So


60+80+120+x=360 (where
x is the fourth angle)


260+x=360


x=100° (after subtracted 260 from both sides of equation)

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