6 Questions
Which of the following is the equation for a circle?
x² + y² = r²
What does the equation x² + y² = r² represent?
A circle
Which of the following equations represents a circle with center at (3, -2) and radius 5?
(x - 3)² + (y + 2)² = 5²
다음 중 원의 방정식으로 올바른 것은 무엇입니까?
x² + y² = r²
원의 방정식은 무엇을 나타냅니까?
원
원의 방정식에서 r은 무엇을 의미합니까?
반지름
Study Notes
Circle Equation
- The equation for a circle is x² + y² = r².
- This equation represents a circle centered at the origin (0, 0) with radius r.
Circle with Center (a, b) and Radius r
- The equation (x - a)² + (y - b)² = r² represents a circle with center at (a, b) and radius r.
- For a circle with center at (3, -2) and radius 5, the equation is (x - 3)² + (y + 2)² = 5².
Variable 'r' in Circle Equation
- In the circle equation, r represents the radius of the circle.
Test your knowledge on circle equations with this quiz! Learn about the equation of a circle, its representation, and identify equations that represent circles with specific centers and radii.
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