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put this solution on YOUR website!ASSUMING NACT IS A STRAIGHT LINE THEN & GIVEN <1=<4 THEN NE=TE.
IF NA=CT THE NA+AC=TC+CA AC BEING CTHE SAME SEGMENT.
THEREFORE EA=EC BECAUSE THESE TRIANGLES ENC=ETA.
BECAUSE EA=EC THEN <2=<3. FOR THE SAME REASON <1=<4.