Equation of a circle

Equation of a circle Quiz

Spec C2 · AQA A-Level Maths: Quiz

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  1. 1. What is the radius of (x−1)2+(y+4)2=49(x-1)^2+(y+4)^2=49?

    • A. 4949
    • B. 77
    • C. 7\sqrt7
    • D. 24.524.5

  2. 2. A circle has centre (−2,5)(-2,5) and radius 33. Which is its equation?

    • A. (x−2)2+(y+5)2=9(x-2)^2+(y+5)^2=9
    • B. (x+2)2+(y−5)2=3(x+2)^2+(y-5)^2=3
    • C. (x−2)2+(y−5)2=9(x-2)^2+(y-5)^2=9
    • D. (x+2)2+(y−5)2=9(x+2)^2+(y-5)^2=9

  3. 3. What is the centre of x2+y2−8x+2y−3=0x^2+y^2-8x+2y-3=0?

    • A. (4,−1)(4,-1)
    • B. (−4,1)(-4,1)
    • C. (8,−2)(8,-2)
    • D. (4,1)(4,1)

  4. 4. Where is the point (5,5)(5,5) relative to the circle (x−2)2+(y−1)2=20(x-2)^2+(y-1)^2=20?

    • A. On the circle
    • B. Inside the circle
    • C. Outside the circle
    • D. At the centre

  5. 5. The points A(1,2)A(1,2) and B(7,10)B(7,10) are the ends of a diameter. What is the radius?

    • A. 1010
    • B. 55
    • C. 50\sqrt{50}
    • D. 10\sqrt{10}

Quiz