A park, in the shape of a quadrilateral `A B C D ,\ h a s\ /_C=90^@,\ A B=9c m ,\ B C=12 c m ,\ C D=5m\ a n d\ A D=8mdot` How much area does it occupy? So, we can calculate BD by applying Pythagoras theorem

Explanation

To find the area of the quadrilateral ABCD, we can break it down into two triangles: triangle BCD and triangle ABD.

### Step 1: Calculate the length of diagonal BD using the Pythagorean theorem.

Since angle C is 90 degrees, we can apply the Pythagorean theorem in triangle BCD.

\[
BD^2 = BC^2 + CD^2
...