Flashcard: Math 3 Special Segments in a Circle

Front

What is a tangent segment in a circle?

Back

A tangent segment is a line segment that touches a circle at exactly one point and is perpendicular to the radius at that point.

Front

Define a chord in a circle.

Back

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

Front

What is the diameter of a circle?

Back

The diameter is a chord that passes through the center of the circle and is the longest chord.

Front

Explain the relationship between the radius and diameter of a circle.

Back

The diameter is twice the length of the radius (Diameter = 2 × Radius).

Front

What is the formula for the circumference of a circle?

Back

Circumference = π × Diameter or Circumference = 2 × π × Radius.

Front

How do you find the area of a circle?

Back

Area = π × Radius².

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 and whose sides are radii.

Front

Define an inscribed angle in a circle.

Back

An inscribed angle is formed by two chords in a circle which have a common endpoint.

Front

What is the relationship between an inscribed angle and its intercepted arc?

Back

The measure of an inscribed angle is half the measure of its intercepted arc.

Front

What is a secant line in relation to a circle?

Back

A secant line is a line that intersects a circle at two points.