# Worksheet: Heron's Formula

In this worksheet, we will practice using Heron's formula to find the area of a triangle.

**Q4: **

Find the area of the figure below using Heronβs Formula, giving the answer to three decimal places.

**Q5: **

Find the area of the figure below using Heronβs Formula.

**Q6: **

The perimeter of the given rhombus is 292 cm and the length of is 116 cm. Use Heronβs Formula to calculate the area of the rhombus, giving the answer to three decimal places.

**Q7: **

The lengths of a triangle are 12 cm, 5 cm, and 11 cm. Find the radius of the interior circle touching the sides using the formula , where is half of the triangleβs perimeter.

- A cm
- B cm
- C cm
- D cm

**Q8: **

is a quadrilateral, where , , , , and . Find the area of giving the answer to the nearest hundredth.

**Q9: **

In sequence, the four sides of a quadrilateral are of lengths 5.7, 7.2, 9.4, and 12.8. The angle between the two shortest sides is . What is the area of this quadrilateral?

**Q10: **

The four sequential sides of a quadrilateral have lengths 4.5 cm, 7.9 cm, 9.4 cm, and 12.9 cm. The angle between the two smallest sides is . What is the area of this quadrilateral?

**Q11: **

is a triangle, where cm, cm, and cm. Find the area of giving the answer to the nearest square centimetre.