Question

a perimeter of a Trapezium is 52 cm and its each non parallel sides is equal to 10 cm and its height is 8 cm find the area of the trapezium

in book ans is 128cm square

Answer 1

Look,

The perimeter is given 52 cm and the sum of non parallel sides is 20 cm.

This gives you the sum of parallel sides which is equal to 52-20=32cm.

Now,

Area= sum of parallel sides*height/2

=> 32*8/2

=128 cm square.