3 years ago

Three angles of a quadrilateral are 75°, 90° and 75°. What is the measure of the fourth angle?

Mathematics

1 answer:

Sergio039 [100]3 years ago

4 0

the inside of quadrilateral is always 360°.So add 75°,90° and 75° and then subyaract from360°.

x+75°+75°+90°=360

×+240°=360°

x=360°-240°

x=120°

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