Circle Geometry Concepts

The video tutorial introduces the basic properties of a circle, including its radius and diameter. It explains how the diameter passes through the center and spans from one side to the other. The tutorial then revisits these properties before moving on to discuss the formulas for calculating the area and circumference of a circle, using pi as a constant.

What is the distance from the center of a circle to its rim called?

• Diameter

• Radius

• Area

• Circumference

Which line passes through the center of a circle and touches both sides?

• Radius

• Circumference

• Diameter

• Chord

What mathematical constant is often used in calculations involving circles?

• e

• i

• pi

• phi

Which formula is used to calculate the area of a circle?

• 2πr

• πr^2

• πd

• 2πd

What formula would you use to find the circumference of a circle?

• πr^2

• πd

• r^2

• 2πr