First, find the missing side of trapezium by finding the perimeter of the square and then find the height of trapezium by Pythagoras theorem.

A = 1/2 x (Sum of parallel sides) x h

First, find the missing side of trapezium by finding the perimeter of the square and then find the height of trapezium by Pythagoras theorem.

A = 1/2 x (Sum of parallel sides) x h

First find the altitude of trapezium by the using the concept of centroid that divides height in 2:1 and then find the area of the trapezium.

A = 1/2 x (Sum of parallel sides) x h

Area of triangle = (h x b) /2