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Two angles of a quadrilateral each measure 70°. A third angle of the quadrilateral measures 115°. What is the measure of the fourth angle of the quadrilateral?
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Two angles of a quadrilateral each measure 70°. A third angle of the quadrilateral measures 115°. What is the measure of the fourth angle of the quadrilateral?

User Tomastrajan
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1 Answer

5 votes
Quadrilateral's angles add up to 360 degree
So .....
70+70+115+x=360
255+x=360
x=360-255
x=105 degrees

Hope I didn't mess up for your sake.
User ObiHill
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