# 11.8.4. Heron's Formula

Find, to the nearest hundredth, the area of quadrilateral

- A
- B
- C
- D

### Example

Find, to the nearest hundredth, the area of quadrilateral

### Solution

The quadrilateral is composed of two triangles. The first triangle,

According to Heron's formula, the area of a triangle whose side lengths are

The second triangle of which the quadrilateral is composed,

Thus, the area of the quadrilateral is approximately