CIRCLES - radius, diameter, circumference, area

CIRCLES - radius, diameter, circumference, area

Multiple Choice

The circumference of the clock in Jason's room is 43.96 in.

^{What would you do to determine the diameter of the clock?}

• Divide the circumference by 𝜋.

• Divide the circumference by 𝜋 to determine the radius; then divide the radius by 2.

• Divide the circumference by 𝜋 to determine the radius; then multiply the radius by 2.

• Multiply the circumference by 𝜋 .

Multiple Choice

The picture shows 3 equal circles touching each other.

QV = 7.3 cm. Calculate the perimeter of the triangle QUS.

It measurement, in cm, will be:

• 43.3

• 44.1

• 43.5

• 43.8

Multiple Choice

The image shows 4 equal coins in a row. The radius of one of these coins is 6.25 cm as shown. Calculate the distance, in mm, from the point R to the point S.

• 480

• 52

• 500

• 5400

Multiple Choice

A cathedral window is built in the shape of a semicircle. If the window is to contain three stained glass sections of equal size, what is the area of each stained glass section? Express answer to the nearest square foot. (Hint: the 3 sections together are 1/2 a circle, so each section is how much of the circle?)

• 1 sq. ft

• 13 sq. ft

• 3 sq. ft

• 26 sq. ft

Multiple Choice

The diameter of circle L is 20 units and the diameter of circle M is 13 units and QR = 4. Find LQ.

• 16 units

• 6 units

• 14 units

• 9 units

Multiple Choice

What is the perimeter of this semi circle? (Use 3.14 = π and round to the nearest tenths place)

• 12.6
• 20.6
• 25.1
• 33.1

Multiple Choice

The homeowners association wants to enclose a circular playground in a fence. The need to find the amount of fencing they need to purchase.  Will they need the area or circumference of the playground?

• area
• circumference
• neither

Multiple Choice

If you are going to paint the entire center circle of a basketball court, do you need to know the area or circumference of the circle?

• Area
• Circumference
• Neither

Multiple Choice

What is the area of this circle?
d = 8cm

• 16π
• 8π
• 4π
• 36π

Multiple Choice

Ms. Merine calculated that her hoop earring has a diameter of 3.5 centimeters. What is the area of her earring (round to the hundreth's place)?

• 9.25 cm²
• 9.62 cm²
• 9.15 cm²
• 9.99 cm²

Multiple Choice

How many degrees are in a cirlce?

• 90
• 180
• 270
• 360

Multiple Choice

Which is true

• All radii are chords
• All chords are Diameters
• All diameters are chords
• All tangents are chords

Multiple Choice

What is true about chords?

• Their end points are on the circle
• They go though the circle
• They touch the circle at one point
• They always go through the center point

Multiple Choice

The distance around a circle; much like the perimeter of a rectangle.

• perimeter
• diameter
• circumference
• radius

Multiple Choice

Name a tangent.

• Segment XC
• Segment LM
• Segment HJ
• LINE BD

Multiple Choice

Name a chord.

• Segment XC
• Segment LM
• Segment HJ
• LINE BD

Multiple Choice

What is AB?

• diameter
• center
• circumference
• radius