Geometry and trigonometry
Circle
The set of all points in a plane that are the same distance from one centre point.
Common notation(x−h)²+(y−k)²=r²
In one sentence
What does Circle mean?
The set of all points in a plane that are the same distance from one centre point.
How it is written
(x−h)²+(y−k)²=r²
A compact example
A circle with radius 3 has circumference 6π and area 9π.
Other names and search terms
circumference.
Where this fits
When should you learn Circle?
The first encounter is not the final level. Many ideas begin visually, become computational in high school and become formal in college.
- 1Pre-high schoolUsually introduced
- 2High schoolGreater depth
- 3CollegeGreater depth
- 4AdvancedGreater depth
- Geometry
- Trigonometry
- Arithmetic
- Measurement
- Vectors
- Waves
- Coordinate geometry
Angles, coordinates and trigonometric waves feed directly into vectors and wave mathematics.
Open the Zero-to-QM pathClear answers
Questions about Circle
What does Circle mean in mathematics?
The set of all points in a plane that are the same distance from one centre point.
How is Circle written?
A common notation is (x−h)²+(y−k)²=r².
What is an example of Circle?
A circle with radius 3 has circumference 6π and area 9π.