Points `M and N` are the mid points of sides `PA and PA of DeltaPAB. As P` moves along a line that is parallel to side AB, how many of the following quantities listed below changes.

Prove that line segment joining mid points of the two sides of the triangle is parallel to third side.

Show that the line joining the mid points of two sides of a triangle is parallel to the third side.

D, E and F are the mid-points of sides of Delta ABC . P, Q, R are the mid-points of sides DEF. This process of marking the mid-points and forming a new triangle is continued. How are the areas of these triangles related?

D and E are the mid-points of the sides AB and AC of Delta ABC and O is any point on side BC. O is joined to A. If P and Q are the mid-points of OB and OC respectively, then DEQP is

Dand E are the mid-points of the sides AB and AC of DeltaABC and O is any point on side BC. O is joined to A. If P and Q are the mid-points of OB and OC respectively, then DEQP is

E is the mid-point of side AB and F is the mid point of side DC of parallelogram ABCD . Prove that AEFD is a parallelogram.

Prove that the line joining the mid-points of the two sides of a triangle is parallel to the third side.

Prove that the line joining the mid-points of the two sides of a triangle is parallel to the third side.

Prove that the line segment joining the mid points of two sides of a triangle is parallel to its third side.

E is the mid-point of the side AD of the trapezium ABCD with AB||DC . A line through E drawn parallel to AB intersects BC at F. then