Draw a large scalene triangle on a sheet of paper.Name the vertices A, B and C. Find the mid-points (D and E) of two sides and connect them.Cut out  and cut along line .Place  on quadrilateral  with vertex E on vertex C. Write down your observations.Shift  to place vertex D on vertex B. Write down your observations.What do you notice about the lengths  and ?Make a conjecture regarding the line joining the mid-point of two sides of a triangle.
Please refer figure for futhure clarification:-
Midpoint throm states that when in a traingle two midpoint are joined of two sided they are || to other and half of its length