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Abc is an Isosceles Triangle in Which Ab = Ac. Be and Cf Are Its Two Medians. Show that Be = Cf. - Mathematics

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Question

ABC is an isosceles triangle in which AB = AC. BE and CF are its two medians. Show that BE = CF.

Answer in Brief

Solution

In the triangle ABC it is given that 

AB = AC,  BE and  CFare medians.

We have to show that  BE CF

To show  BF = CF we will show that ΔBFC ≅ ΔBEC

In triangle ΔBFC and ΔBEC

As AB = AC, so 

 ∠FBC = ∠ECF            .........(1)

BC=BC (common sides)   ........(2)

Since,

 AB = AC

`1/2 AB  =1/2 AC `

As F and E are mid points of sides AB and AC respectively, so

BF = CE ..........(3)

From equation (1), (2)and (3)

ΔBFC and ΔBEC

Hence FC = BE Proved.

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Criteria for Congruence of Triangles
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Chapter 12: Congruent Triangles - Exercise 12.7 [Page 84]

APPEARS IN

RD Sharma Mathematics [English] Class 9
Chapter 12 Congruent Triangles
Exercise 12.7 | Q 6 | Page 84
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