9. TBQ - Area of an isosceles trapezium

The parallel sides of a trapezium are \(40 \ cm\) and \(20 \ cm\). If its non-parallel sides are both equal, each being \(26 \ cm\), estimate the area of the trapezium.

 

 

Area of the trapezium \(=\) 725710715720 \(cm^2\)