**Q3: **

Use determinants to find the area of the triangle with vertices , , and .

**Q4: **

Use determinants to work out the area of the triangle with vertices , , and by viewing the triangle as half of a parallelogram.

**Q5: **

Consider the quadrilateral with vertices , and .

By breaking it into two triangles as shown, calculate the area of this quadrilateral using determinants.

**Q6: **

Consider the equation If triangle has an area of 38, what is the radius of its circumcircle?

- A4
- B8
- C
- D2
- E