Mathematics

In the given figure, P is a point in the interior of ∠ABC. If PL ⊥ BA and PM ⊥ BC such that PL = PM, prove that BP is the bisector of ∠ABC.

In the given figure, P is a point in the interior of ∠ABC. If PL ⊥ BA and PM ⊥ BC such that PL = PM, prove that BP is the bisector of ∠ABC.R.S. Aggarwal Mathematics Solutions ICSE Class 9.

Triangles

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Answer

Given,

In △BLP and △BMP,

⇒ ∠L = ∠M = 90°

⇒ PL = PM [Given]

⇒ PB = PB [Common side]

∴ △BLP ≅ △BMP (By R.H.S. axiom)

⇒ ∠LBP = ∠PBM [Corresponding angles of congruent triangles are equal.]

Hence, proved that BP is the bisector of ∠ABC.

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