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by shashank.ism » Tue Feb 09, 2010 7:27 am
ABCD is a convex quadrilateral in which <(BAC) = <(CBD) = 30 deg, <(CAD) = 60 deg, <(CDB) = 15 deg. If E is the point of intersection of AC and BD, then measure of <(BEA) in degrees (is)

a 60
b 75
c 105
d 120
e none of these
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by harsh.champ » Tue Feb 09, 2010 2:32 pm
shashank.ism wrote:ABCD is a convex quadrilateral in which <(BAC) = <(CBD) = 30 deg, <(CAD) = 60 deg, <(CDB) = 15 deg. If E is the point of intersection of AC and BD, then measure of <(BEA) in degrees (is)

a 60
b 75
c 105
d 120
e none of these
BEA would be convex = 1/2(15 + 255) = 135. none [sum of int. angle = exterior angle]
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