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In a δAbc, E and F Are the Mid-points of Ac and Ab Respectively. the Altitude Ap to Bc Intersects Fe at Q. Prove that Aq = Qp.

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Question

In a ΔABC, E and F are the mid-points of AC and AB respectively. The altitude AP to BC
intersects FE at Q. Prove that AQ = QP.

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Solution

In ΔABC

E and F are midpoints of AB and  AC

∴ EF || FE, `1/2` BC =FE                [  ∴ By mid-point theorem]

In ΔABP

F is the midpoint of AB and   FQ || BP         [ ∵ EF || BC ]

∴ Q is the midpoint of AP                     [By converse of midpoint theorem]

Hence, AQ = QP

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Chapter 13: Quadrilaterals - Exercise 13.4 [Page 63]

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R.D. Sharma Mathematics [English] Class 9
Chapter 13 Quadrilaterals
Exercise 13.4 | Q 5 | Page 63

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