ABC is an isosceles triangle in which AB=AC . AD bisect exterior angle PAC and CD || AB .Show that i.) angle DAC = angle BCA ii.) ABCD is a parallelogram
In given figure the side QR of triangle PQR is produced to a point S.if the bisectors of angle PQR and angle PRS meet a point T,then prove that angle QTR=1/2 angle QPR.