CAIE IGCSE Additional Math 8.1 Use Circle Equations Questions
Practise Cambridge IGCSE Additional Mathematics by forming circle equations, finding centres and radii and testing point positions.
- Syllabus
- 2028–2030
- Course
- Additional Mathematics 0606
Exam points
- Determine the equation of a circle from its centre, radius or points on the circumference.
- Use diameter endpoints and completing-square forms to identify centre and radius.
- Check whether a point lies on, inside or outside the circle using the circle equation.
CAIE IGCSE Additional Math 8.1 Use Circle Equations Questions question 1
[Maximum number: 2]
Solutions to this question by accurate drawing will not be accepted.
A circle has centre (4,2) and meets the x-axis at (-2,0).
Find the equation of the circle.
(x−4)2+(y−2)2=40 oe, isw
or
x2+y2−8x−4y−20=0 oe, isw
B1 for r2=40 or r=40 oe, soi.
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