13. Five marks exercise problems X

A park is in the shape of a quadrilateral. The sides of the park are \(15 \ m\), \(20 \ m\), \(26 \ m\) and \(17 \ m\) and the angle between the first two sides is a right angle. Find the area of the park.

 

 

The area of the park \(=\)  \(m^2\)