Parts of circle

Front

What is the definition of a radius in a circle?

Back

The radius is the line segment from the center of the circle to any point on the circle.

Front

What is the definition of a diameter in a circle?

Back

The diameter is the line segment that passes through the center of the circle and connects two points on the circle.

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

How is the diameter related to the radius?

Back

The diameter is twice the length of the radius.

Front

What is the formula for calculating the circumference of a circle?

Back

The circumference (C) is calculated using the formula C = πd, where d is the diameter.

Front

What is the area of a circle?

Back

The area (A) of a circle is calculated using the formula A = πr², where r is the radius.

Front

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

Back

The area of a circle increases with the square of the radius.

Front

What is the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circle.

Front

What is the term for a line that touches a circle at exactly one point?

Back

A tangent.

Front

What is the term for the longest chord in a circle?

Back

The diameter.