The sides of a quadrilateral, taken in order are and respectively. The angle contained by the last two sides is a right angle. Find the area of the quadrilateral.
Answer:
Area:
- The following picture shows the quadrilateral
- Let's draw a line .
The is the right-angled triangle.
- Now, we can see that, this quadrilateral consists of the triangles and .
The area of the can be calculated using Heron's formula since all sides of the triangle are known.