graphing form of circles

Flashcard
•
Mathematics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does (h,k) stand for in the standard circle equation?
Back
(h,k) is the center of the circle.
2.
FLASHCARD QUESTION
Front
What is the equation of a circle with radius 2 and center (3, 4)?
Back
(x-3)² + (y-4)² = 4
3.
FLASHCARD QUESTION
Front
What is the center of the circle with equation x² + y² = 1?
Back
(0, 0)
4.
FLASHCARD QUESTION
Front
In order to convert from general form of a circle to graphing form, you must ___________.
Back
complete the square.
5.
FLASHCARD QUESTION
Front
The diameter of a circle has length 12. The center is at (-5, 2). Give the equation of the circle.
Back
(x + 5)² + (y - 2)² = 36.
6.
FLASHCARD QUESTION
Front
What is the standard form of a circle's equation?
Back
(x-h)² + (y-k)² = r², where (h,k) is the center and r is the radius.
7.
FLASHCARD QUESTION
Front
How do you find the radius from the equation of a circle?
Back
The radius is the square root of the number on the right side of the equation in standard form.
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