Circle Review for flashcard

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius of the circle.

Front

What is the circumference of a circle?

Back

Circumference = 2πr, where r is the radius of the circle.

Front

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

Back

Diameter = 2 × Radius.

Front

What is the value of π (pi) approximately?

Back

π ≈ 3.14.

Front

How do you find the radius if you know the area of a circle?

Back

Radius = √(Area/π).

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is a tangent to a circle?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is the central angle of a circle?

Back

A central angle is an angle whose vertex is at the center of the circle.

Front

What is an inscribed angle?

Back

An inscribed angle is formed by two chords in a circle which share an endpoint.

Front

What is the relationship between an inscribed angle and the central angle that subtends the same arc?

Back

The inscribed angle is half the measure of the central angle.