how to construct this following. Take any three non collinear points A, B, C and draw a triangle ABC. Through each vertex of the triangle , draw a line parallel to the opposite side.

Draw a line PR parallel to BC passing through the vertex A.

Similarly draw a line PQ parallel to AC passing through the vertex B

Also, draw a line QR parallel to AB passing through the vertex C.

Thus, we get the required figure.

**
**