Q8 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).
Let P is mid point of line AB and Q is mid point of line AC .
PQ is line joining mid points P and Q of line AB and AC , respectively.
i.e. and .
From equation 1 and 2 , we get
By basic proportionality theorem , we have