Take a line segment BC . Draw a line segment perpendicular to BC through C and magnitude equal to half of BC upto D and join B to D , taking D as centre and DC as radius cut an Arc on BD at E . Taking C as centre and CB as radius ,and B as centre and BE as radius cut to Arcs respectively meeting each other at A !!! Join B to A . Now the question is to determine the angle ABC !! [ Write the answer in degrees ]
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