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Answer:
Use RHS property to prove.
Step-by-step explanation:
GIVEN:
XY=YZ 1
BY=YC 2
XY⊥AB
BY⊥AC
∴∠AXY=90°=∠BXY ( LINEAR PAIR ) 3
∠AZY=90°=∠CZY ( LINEAR PAIR ) 4
From 1,2,3,4 In ΔBXY and ΔCYZ
XY=YZ
BY=YC
∠BXY=∠CZY
ΔBXY ≅ ΔCYZ ( RHS property of triangle )
∴ BX = CZ A
JOIN AY to make ΔAXY and ΔAZY
∠AXY = 90° = ∠AZY ( GIVEN )
XY = ZY ( GIVEN )
∠AYX =∠AYZ ( AY BISECTS ∠XYZ )
∴ ΔAXY ≅ ΔAZY ( ASA property )
∴ AX = AZ B
FROM adding A and B
AX+BX = AZ+ZC
AB = AC
Hence proved
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