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You can create printable tests and worksheets from these Grade 11 Circles questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

If the points (1, 2) and (-5, 2) are endpoints of a diameter of a given circle, what is the equation of this circle?
1. $(x-1)^2 + (y-2)^2 = 1$
2. $(x+5)^2 + (y-2)^2 = 9$
3. $(x+2)^2 + (y-2)^2 = 9$
4. $(x+3)^2 + y(-1)^2 = 3$
What is the center and radius of the circle given by the following equation?
$x^2 + y^2 - 18x + 6y + 65 = 0$
1. $"Center": (18, -6), \ "Radius": 65$
2. $"Center": (9,-3), \ "Radius": 5$
3. $"Center": (0,0), \ "Radius": sqrt(65)$
4. $"Center": (-9,3), \ "Radius": 25$
What is the center and radius of the circle given by the following equation?
$x^2 + y^2 -2x +10y + 22 = 0$
1. $"Center": (0, 0), \ "radius": sqrt(22)$
2. $"Center": (-2, 10), \ "radius": sqrt(22)$
3. $"Center": (1,-5), \ "radius": 2$
4. $"Center":(1,-5), \ "radius": 4$
Write an equation for a circle if the endpoints of a diameter are at (1,1) and (1,-9).
1. $(x-1)^2+(y+4)^2=5$
2. $(x-1)^2+(y+4)^2=25$
3. $(x+1)^2+(y-4)^2=5$
4. $(x+1)^2+(y-4)^2=25$
Write an equation for the circle with center (2,1) that passes through (2,4).
1. $(x-2)^2+(y-1)^2=9$
2. $(x-2)^2+(y-1)^2=3$
3. $(x+3)^2+(y+1)^2=9$
4. $(x+3)^2+(y+1)^2=3$
Given the equation of a circle, $(x-3)^2+(y+5)^2=10$, what is the circle's radius?
1. $5$
2. $100$
3. $sqrt5$
4. $sqrt10$