Line joining vertex to mid point of opposite side of a triangle is median of a triangle.

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For ∆ABC
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Here, AD is the median of triangle ∆ABC

& D is mid-point of BC.

i.e. BD = CD

Similarly, we can draw median from point B

Here, BE is the median of ∆ABC

& E is the mid point of AC

i.e. AE = EC.

And, we can draw median from point C

Here, CF is the median of ∆ABC

& F is the mid point of AB.

i.e. AF = FB.

So, our median can be

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For
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obtuse
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angled triangle ∆ABC
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Medians are

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For right
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angled triangle ∆ABC
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Medians are