1. Take identical cut-outs of congruent triangles of sides 3 cm, 4 cm, 5 cm. Arrange them as shown (Fig 3.11).
You get a trapezium. (Check it!) Which are the parallel sides here? Should the
non-parallel sides be equal?
You can get two more trapeziums using the same set of triangles. Find them out and
discuss their shapes.
AB and CD are parallel sides.BC and AD are non parallel sides.Non parallel sides need not be equal.
We can get two more trapeziums using the same set of triangles-