Show that the straight lines joining the mid - points of the opposite sides of a quadrilateral bisect each other .

Show that the line segments joining the midpoints of the opposite sides of a quadrilateral and bisect each other.

Show that the straight line joining the mid - points of two sides of a triangle is equal to half the third side .

By vector method prove that the straight line joining the midpoints of two non-parallel sides of a trapezium is parallel to the parllel sides and half of their sum.

Using vector properties, show that, a straight line obtained by joining the mid-points of the oblique sides of a trapezium is parallel to the parallel sides of the trapezium and is equal to half of the sum of lengths of the parallel sides.

Using the properties of vectors, prove that the straight line, obtained by joining the mid-poings of two sides of a triangle , is half of the length of third side.

By vector method prove that the straight line joining the mid-points of the diagonals of a trapezium is parallel ot the parallel sides and half of their difference.

Prove that the area of the parallelogram produced by joining the mid-points of the sides of a quadrilateral taken in order is half the area of the quadrilateral.

Using vector method show that the line joining the middle points of two sides of a triangle is parallel and half of the third side.

The straight line joining the points (-3,-4) and(2,5) is -

Prove that the line segment joining the mid-points of the lateral sides of any trapezium is parallel to any of its parallel sides.