Q3 W10 IA (Circle Vocab 2)

Front

What is a Major Arc?

Back

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

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 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 Sector of a Circle?

Back

A Sector is the area enclosed by two radii and the arc between them.

Front

What is a Segment of a Circle?

Back

A Segment is the area enclosed by a chord and the arc connecting the endpoints of the chord.

Front

How is a Minor Arc denoted?

Back

A Minor Arc is denoted by the two endpoints of the arc, using only two letters.

Front

How is a Major Arc denoted?

Back

A Major Arc is denoted by the two endpoints of the arc and a point on the arc, using three letters.

Front

What is the relationship between a Minor Arc and a Major Arc?

Back

The sum of the measures of a Minor Arc and a Major Arc that share the same endpoints is 360 degrees.

Front

What is the formula for the length of an Arc?

Back

The length of an Arc = (θ/360) * 2πr, where θ is the angle in degrees and r is the radius.