Prove that the four triangles formed by joining in pairs, the mid-points of three sides of a triangle, are congruent to each other.

The four triangles formed by joining the midpoints of the sides of a given triangle are equal in area: each equal to one-fourth of given triangle.

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

Find the Area of the triangle formed by joining the mid points of the sides (0,-1) (2,1) and (0,3)

In /_\ A B C ,\ /_A=30^@,\ /_B=40^@a n d\ /_C=110^@ . The angles of the triangle formed by joining the mid-points of the sides of this triangle are