In the figure given below,
Then prove that △ ACR ≅ △ YCR.
taking △ ACR and △ YCR, we have
AR = YR (perpendicular bisector) [1 Mark]
∠ ARC = ∠ YRC = 90∘ (perpendicular bisector) [1 Mark]
CR = CR (common side)
△ ACR ≅ △ YCR (By SAS Congruency) [1 Mark]