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Grade 66 grade maths

if the two angles of a quadrilateral are supplementary and the third angle is 30degrees ,then find the fourth angle

Profile image of bharat
7 Years agoGrade 6
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1 Answer

Profile image of Arun
7 Years ago
if two angles(A and B) are supplementary then
A + B = 180
 
now A + B + C + D = 360
 
D+ 180 + 30 = 360
 
hence D = 360 – 210 = 150
 
Hope it helps
 
 

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