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Is an exterior angle of a quadrilateral is 90 degrees is sometimes,always,or never true
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Is an exterior angle of a quadrilateral is 90 degrees is sometimes,always,or never true

User Tom Brunberg
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an exterior angle of a quadrilateral not will be never of measure of 90 degrees bc. the interior angles of a quadrilateral has measure of 90 degrees  
User Stjepano
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