Vocabulary
Diameter and Radius
Circumference
Formulas
Arcs
100

A line segment from the center to a point on a circle is called 

radius 

100

C=30m, What is the diameter of the circle? 

10.2m

100

d= 8.5in, What is the circumference of the circle? 

26.69

100

What is the formula of circumference?

C=2rπ or C=dπ

100
An arc whose measure is less than 180 degrees
What is a minor arc?
200

The set of all points in a plane that are the same distance from a given point called the center is called 

Circle

200

The diameter of circle J is 10, what is the radius of the circle?

5

200

What is the circumference of a circle, if the radius is 4cm?

25.12cm

200

What is the formula of area of a circle? 

A=πr^2

200
An arc which has a measure of exactly 180 degrees
What is a semi-circle?
300

The ratio of circumference divided by diameter is called 

pi

300

If the diameter is 42 cm, then the radius is ?

21 cm

300

r=4.8ft, what is the circumference of the circle? 

30.14ft 

300

What is the forumla of radius? 

r= d/2

300
The distance along the curved line making up the arc
What is the arc length?
400

A chord that passes through the center of a circle is called

Diameter

400

C=148.3ft, What is the radius? 

23.6ft 

400

What is the ciircumference of a circle if the diameter is 13 3/4 cm?

43.17cm

400

What is the forumla of diameter?

d=2r

400

An angle with a vertex at the center of a circle and sides that are radii is called...

Central angle 

500

A segment with endpoints on the circle is called

Chord

500

C= 256ft, what is the diameter? 

81.52 ft 

500
If the diameter is 7 3/5 ft, what is the circumference of the circle?

23.86ft 

500

BONUS: 

What is it called when looking for the total value of the circle?

Circumference

500

An arc that has a measure greater than 180 degrees is called?

Major arc 

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