Equation of a circle
10th grade (Year 11 in England) · 16 questions · Common Core: HSG.GPE.A.1 · England: GCSE Higher Algebra
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Question 1
The circle x² + y² = r² passes through (12, 9). What is r?
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Question 2
What is the centre of the circle (x + 3)² + (y − 4)² = 25? Type it like (2, −1).
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Question 3
The circle x² + y² = r² passes through (15, −20). What is r?
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Question 4
What is the centre of the circle x² + (y − 5)² = 36? Type it like (2, −1).
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Question 5
The circle x² + y² = r² passes through (5, −12). What is r?
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Question 6
What is the centre of the circle (x − 1)² + (y + 4)² = 36? Type it like (2, −1).
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Question 7
The circle x² + y² = r² passes through (0, 5). What is r?
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Question 8
What is the radius of the circle (x + 5)² + (y − 1)² = 49?
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Question 9
The circle x² + y² = r² passes through (4, −3). What is r?
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Question 10
What is the radius of the circle x² + (y + 1)² = 81?
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Question 11
The circle x² + y² = r² passes through (−6, 8). What is r?
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Question 12
What is the centre of the circle (x + 2)² + (y + 6)² = 9? Type it like (2, −1).
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Question 13
The circle x² + y² = r² passes through (−6, −8). What is r?
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Question 14
What is the radius of the circle (x + 4)² + (y + 6)² = 36?
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Question 15
The circle x² + y² = r² passes through (−8, −6). What is r?
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Question 16
What is the centre of the circle (x − 5)² + (y + 1)² = 9? Type it like (2, −1).
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