ABCD is a square and P is the midpoint of AD. BP and CP are joined. Prove that angle PCB= angle PBC

In triangle PAB and triangle PDC

AB = DC (sides of square)

angle A=angle D (each 90)

PA = PD (P is the mid point)

By SAS

triangle PAB is congruent to triangle PDC

PB = PC (By CPCT)

In triangle PBC

PB = PC (proved above)

angle PBC=anglePCB (angles opp. to equal sides of a triangle are equal)

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