Circle terminology

Front

What is a Minor Arc?

Back

A Minor Arc is the shorter arc connecting two points on a circle, measuring less than 180 degrees.

Front

What is a Major Arc?

Back

A Major Arc is the longer arc connecting two points on a circle, measuring more than 180 degrees.

Tags

CCSS.HSG.C.B.5

Front

What is a Semi-Circle?

Back

A Semi-Circle is an arc that measures exactly 180 degrees, dividing the circle into two equal halves.

Front

What is a Central Angle?

Back

A Central Angle is an angle whose vertex is at the center of the circle and whose sides intersect the circle.

Front

What is a Chord?

Back

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

Front

What is a Diameter?

Back

A Diameter is a special type of chord that passes through the center of the circle, dividing it into two equal parts.

Tags

CCSS.HSG.C.A.2

Front

What is a Radius?

Back

A Radius is a line segment from the center of the circle to any point on the circle.

Front

What is an Inscribed Angle?

Back

An Inscribed Angle is an angle formed by two chords in a circle which have a common endpoint.

Tags

CCSS.HSG.C.A.2

Front

How do you calculate the circumference of a circle?

Back

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

Tags

CCSS.7.G.B.4

Front

What is the relationship between the diameter and radius?

Back

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

Tags

CCSS.7.G.B.4