Circle Geometry Concepts

Front

What does C represent in the formula: C = π·d?

Back

Circumference

Front

What is the formula to calculate the circumference of a circle?

Back

C = π·d or C = 2·π·r (where d is diameter and r is radius)

Front

What is the value of π (Pi) approximately?

Back

3.14

Front

What is the relationship between the diameter and radius of a circle?

Back

The diameter is twice the radius (d = 2·r).

Front

What is the area of a circle formula?

Back

A = π·r² (where r is the radius)

Front

How do you find the radius if you know the circumference?

Back

r = C / (2·π)

Front

What is the diameter of a circle if the radius is 5 cm?

Back

10 cm (d = 2·r)

Front

What is the circumference of a circle with a diameter of 10 cm?

Back

31.4 cm (C = π·d = π·10)

Front

What is the area of a circle with a radius of 3 cm?

Back

28.26 cm² (A = π·r² = π·3²)

Front

What is a chord in a circle?

Back

A line segment with both endpoints on the circle.