Class- 10 Mathematics Triangles NCERT book part-4 by Rahimuddin Sheikh

Exercise 6.2 6. In fig. 6.21 , A , B and C are points on OP, OQ and OR respectively such that AB|| PQ and AC ||PR . Show that BC || QR 7. Using theorem 6.1 ,prove that a line drawn through the mid-point of one side of a triangle is parallel to another side bisect the third side. (Recall that you have proved it in class IX). 8. Using theorem 6.2,prove that the line joining the mid-points of any two sides of a triangle is parallel to third side (Recall that you have done it in class IX) .