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orem (6.2). If a line divides any two sides of a -gle it the same rutio, then the line is parallel e third side. theorem can be proved by taking a line DE such AD AE and assuming that DE is not parallel (see Fig. 6.12). If DE is not parallel to BC, draw a line DE el to BC.

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Q1

If a line is drawn parallel to one side of a triangle, prove that the other two sides are divided in the same ratio.

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Q2
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Q3
Using Theorem 6.2, prove that the line joining the mid-points of any two sides of a triangle is parallel to the third side. (Recall that you have done it in Class IX).

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Q4
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Q5

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