# Worksheet: Identifying and Using Parts of a Circle

Q1:

What is the name of the following shape?

• Atriangle
• Bsquare
• Cstar
• Dcircle
• Eplus

Q2:

Are all the radii of a circle equal in length?

• Ayes
• Bno

Q3:

Is the diameter the longest chord in a circle?

• Ayes
• Bno

Q4:

The length of the radius of a circle is the length of its diameter.

• A equal to
• B twice
• C half

Q5:

What is the name for a chord that passes through the center of a circle?

• A the center
• C a diameter

Q6:

Which of the following correctly defines a circle?

• AA circle is the set of points in a plane with a single curved side.
• BA circle is the set of points in a plane that does not have any lines of symmetry.
• CA circle is the set of points in a plane with a limited number of sides.
• DA circle is the set of points in a plane that are the same distance from the a given point called the center.
• EA circle is the set of points in a plane that are different distances away from the center.

Q7:

In the given figure, which of the following would represent the chord passing through and ?

• A
• B
• C
• D
• E

Q8:

Identify all the radii of circle .

• A
• B
• C

Q9:

Identify all the radii in the following circle:

• A
• B
• C

Q10:

Identify the radii of the circle.

• A
• B
• C
• D

Q11:

Identify the diameter of this circle.

• A
• B
• C
• D

Q12:

Which segment in this circle is a chord?

• A
• B
• C

Q13:

In the following figure, determine all the chord(s) of the circle.

• A
• B
• C

Q14:

Given that , find the radius to the circle .

Q15:

If the length of diameter of circle is 158 cm, find the radius of the circle.

Q16:

Determine the diameter of the circle , given that its radius .

Q17:

In the circle , if , find the length of .

Q18:

What is the radius of a circle whose diameter is 18?

Q19:

What is the diameter of a circle whose radius is 3?

Q20:

If the diameters of circles and are 2 cm and 6 cm, respectively, determine the length of .

Q21:

Find the length of .

Q22:

Circles and are of radii 11 and 18 and touch internally. Determine .

Q23:

Given that and in the two concentric circles shown below, find the length of .

Q24:

In the given circle, cm and cm. Determine the lengths of and .

• A ,
• B ,
• C ,
• D cm,

Q25:

Suppose , , and . What is the length of ?