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2 votes
ASAAAPPP NEEDDD HELLLPPPP

ASAAAPPP NEEDDD HELLLPPPP-example-1
User Tetri
by
8.7k points

1 Answer

4 votes

Answer:

280°

Explanation:

You want the measure of external angle x in a quadrilateral with three external angles marked x and one marked 240°.

Angle sum

The sum of the internal angles of a quadrilateral is 360°. The internal angle at each vertex will be the difference between 360° and the external angle:

(360° -240°) +3(360° -x) = 360°

120° +3(360° -x) = 360°

3(360° -x) = 240°

360° -x = 80°

x = 360° -80° = 280°

The size of angle x is 280°.

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User Mike Pugh
by
8.4k points

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