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Circles Vocabulary

Total questions: 30

Worksheet time: 22mins

Name
Class
Date
1.
The radius of a circle is
a)
The measurement from the center of a circle to an edge of the circle.
b)
The measurement around the circle
c)
The measurement from and edge of the circle to another edge through the center
d)
A line perpendicular to the diameter of the circle
2.
An arc is...
a)
A line that passes through the center and goes from edge to edge.
b)
A part of the circumference.
c)
A boat.
d)
A line that touches the circle once.
3.
The diameter of a circle is:
a)
The measurement around the circle.
b)
The distance from an edge of a circle to another edge.
c)
The distance from the center of the circle to an edge of a circle
d)
The distance from an edge of a circle to another edge through the center. 
4.
A tangent line of a circle is...
a)
It's diameter
b)
It's radius
c)
It's circumference
d)
A line that touches the circle only once
5.
Which best describes segment AB?
a)
chord
b)
secant
c)
tangent
d)
diameter
6.
A segment whose endpoints lie on a circle is a _______.
a)
tangent
b)
chord
c)
diameter
d)
secant
7.
An angle whose vertex is the center of a circle is a(n) ______.
a)
inscribed angle
b)
acute angle
c)
obtuse angle
d)
central angle
8.

A circle is named by it _________ point.

a)

tangent

b)

vertex

c)

center

d)

inscribed

9.

Which of the following is a good definition for a circle?

a)

All points equidistant from a single point

b)

A round polygon

c)

A continuous curve

d)

Two semi-circles put together

10.

This type of angle is equal to HALF of the arc it is pointed at.

a)

Inscribed

b)

Central

c)

Concentric

d)

Circumscribed

11.

What type of arc has a measure greater than 180°?

a)

Major

b)

Minor

c)

Semicircle

d)

Intercepted

12.

What type of arc has a measure less than 180°?

a)

Minor

b)

Major

c)

Semicircle

d)

Intercepted

13.

The point where a tangent meets a circle is the...

a)

point of tangency

b)

center

c)

common tangents

d)

radius

14.

An arc that measures exactly 180° is called a

a)

semicircle

b)

major arc

c)

minor arc

d)

diameter

15.

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

a)

secant

b)

tangent

c)

chord

d)

diameter

16.
Two circles are congruent if they have the same __________
a)
Center 
b)
Radius
c)
Inscribed Angle
d)
Central Angle
17.
Two circles are concentric if they have the same ______
a)
Center
b)
Radius
c)
Central Angle 
d)
Inscribed Angle
18.
Which of the following names a diameter?
a)
segment AC
b)
segment DB
c)
segment AB
d)
segment BC
19.
What is the part of the circle highlighted in red called?
a)
semi-circle arc
b)
major arc
c)
minor arc
d)
sector
20.
What is the part of the circle highlighted in red called?
a)
semi-circle arc
b)
major arc
c)
minor arc
d)
sector
21.
What is the part of the circle highlighted in red called?
a)
semi-circle arc
b)
major arc
c)
minor arc
d)
sector
22.
Name a minor arc
a)
arc AD
b)
arc ADB
c)
arc AB
d)
arc CD
23.
True or False: A tangent and a radius form perpendicular lines.
a)
True 
b)
False
24.
What best describes segment AB?
a)
chord
b)
secant
c)
tangent
d)
diameter
25.
Which best describes line AB?
a)
chord
b)
secant
c)
tangent
d)
diameter
26.
Which best describes line AB?
a)
chord
b)
secant
c)
tangent
d)
diameter
27.
Solve for the missing arc
a)
32o
b)
64o
c)
16o
d)
84o
28.
solve for the missing arc
a)
90o
b)
45o
c)
180o
d)
100o
29.
solve for the missing angle
a)
45o
b)
90o
c)
22.5o
d)
128o
30.
solve for the missing angle
a)
24o
b)
48o
c)
12o
d)
6o

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