ABC is a triangle in which AB = AC. P is any point in the interior of the triangle such that angle ABP = angle ACP. Prove that AP bisects angle BAC
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Given : AB = AC
∠ABP = ∠ACP
TO PROVE : ∠BAP = ∠CAP
Proof: In Δ BAP and ΔCAP
AP = AP
AB = AC
∠ABP = ∠ACP
so bye SAS rule ΔBAP = Δ CAP
∴ BY CPCT
∠BAP = ∠CAP
⇒ AP bisects ∠BAC
∠ABP = ∠ACP
TO PROVE : ∠BAP = ∠CAP
Proof: In Δ BAP and ΔCAP
AP = AP
AB = AC
∠ABP = ∠ACP
so bye SAS rule ΔBAP = Δ CAP
∴ BY CPCT
∠BAP = ∠CAP
⇒ AP bisects ∠BAC
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