Question
Three angles of a quadrilateral measure 37∘, 130∘ and 53∘. Find the measure of the fourth angle.
Answer: Option D
:
D
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:
D
Let the fourth angle be x∘.
By angle sum property, we know that sum of interior angles of a quadrilateral is 360∘.
⇒37∘+130∘+53∘+x=360∘
⇒x=360∘−(37∘+130∘+53∘)=360∘ − 220∘=140∘
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