Introduction to Circles
In this tutorial, we delve into the fascinating world of circles. Circles are not just round, they're everywhere! Whether you're designing a wheel or plotting the orbit of planets, understanding circles is key.
Properties of Circles
- Radius: A line from the center of the circle to any point on its boundary.
- Diameter: A line that passes through the center, touching two boundary points. It's twice the radius!
- Circumference: The distance around the circle.
- Area: Cover the inside of the circle.
Key Formulas
To unlock the secrets of circles, master these formulas:
- Diameter: \(D = 2r\)
- Circumference: \(C = 2\pi r\)
- Area: \(A = \pi r^2\)