**Q12: **

Determine the equation of a circle whose centre is at the point , given that the circle touches the straight line .

- A
- B
- C
- D

**Q13: **

The given figure shows a circle with center and a point lying on the circumference of the circle.

Find the length of in terms of and .

- A
- B
- C
- D
- E

Find the length of in terms of and .

- A
- B
- C
- D
- E

Using the Pythagorean Theorem, express in terms of the lengths of and .

- A
- B
- C
- D
- E

**Q14: **

A circle has center and goes through the point . Find the equation of the circle.

- A
- B
- C
- D
- E

**Q15: **

A circle centered at the origin goes through the point (1, 1).

Work out the equation of the circle.

- A
- B
- C
- D
- E

Determine the positive value of when .

- A
- B
- C
- D
- E

Is the point on the circle?

- ANo
- BYes

**Q16: **

A circle has center and goes through the point . Find the equation of the circle.

- A
- B
- C
- D
- E