Page 2 - LN3

 Superpose one triangle on the other. We find that sum of the areas of the two
triangles is the same as the area of the rectangle.
 Both the triangles are equal in area.

 Now,area of each triangle = x (Area of the rectangle)

= x (length of rectangle x breadth of rectangle)

 Again take a square and divide it into four triangles as shown in the figure.
The four triangles are equal in area.

Now, area of each triangle = x (Area of the square)