Circles and Their Parts

Multiple Choice

What is the highlighted label?

• Radius

• Diameter

• Center

Multiple Choice

What is the highlighted label?

• Radius

• Diameter

• Center

Multiple Choice

What is highlighted label?

• Radius

• Diameter

• Center

Multiple Choice

What is QR?

• Radius

• Diameter

• Center

• Chord

Labelling

Label each part of the circle.

Drag labels to their correct position on the image

Chord

Diameter

Radius

Center

Complete IXL 7-Z.13 Parts of a Circle

​Special Relationships within a Circle

Multiple Choice

The diameter is _____ the radius.

• Double

• Half

• Equal to

• Three times

Multiple Choice

The radius is _____ the diameter.

• Double

• Half

• Equal to

• Three times

Multiple Choice

The circumference is about _____ the diameter.

• Double

• Half

• Equal to

• Three times

​Complete questions 1-12 and be ready to submit answers as requested.

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What is the radius for question 2?

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What is the diameter for question 2?

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What is the radius for question 4?

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What is the diameter for question 4?

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What is the radius for question 5?

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What is the diameter for question 5?

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What is the radius for question 11?

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What is the diameter for question 11?

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Calculating Circumference

Multiple Choice

3a - Which is given, the radius or the diameter?

• radius

• diameter

• circumference

Fill in the Blank

3b - What is the diameter of the circle?

Math Response

3c - What is the circumference of the circle in terms of pi?

Type answer here

Correct Answer: 12\pi

Deg^°

Rad

Fill in the Blank

3c - What is the circumference of the circle?

.

Math Response

Let's go for it!

4 - What is the circumference of the circle in terms of pi?

Type answer here

Correct Answer: 2\pi

Deg^°

Rad

Fill in the Blank

Let's go for it!

4 - What is the circumference of the circle?

.

Fill in the Blank

6a - What is the diameter of the circle?

Math Response

6b - What is the circumference of the circle in terms of pi?

Type answer here

Correct Answer: 8\pi

Deg^°

Rad

Fill in the Blank

6c - What is the circumference of the circle?

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Math Response

7a - What is the circumference of the circle in terms of pi?

Type answer here

Correct Answer: 10\pi

Deg^°

Rad

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7b - What is the circumference of the circle?

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Calculating the diameter and radius when given the circumference​

Go backwards!​

1. Divide the circumference by Π  (3.14) to get the diameter.

2. Divide the diameter by 2 to get the radius if it's requested.

​The circumference of a circle is 18Π inches. What is the circle's diameter?

​Go backwards!​

1. Remove the Π to get the diameter.

2. Divide the diameter by 2 to get the radius if it's requested.

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The circumference of a circle is 18Π inches. What is the circle's diameter?

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The circumference of a circle is 18Π inches. What is the circle's radius?

​The circumference of a circle is 125.6 inches. What is the circle's diameter?

Use 3.14 for ​𝜋.

​Go backwards!​

1. Divide the circumference by 3.14 to get the diameter.

2. Divide the diameter by 2 to get the radius if it's requested.

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The circumference of a circle is 125.6 inches. What is the circle's diameter?

Use 3.14 for ​𝜋.

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The circumference of a circle is 125.6 inches. What is the circle's radius?

Use 3.14 for ​𝜋.

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The circumference of a circle is 59.66 inches. What is the circle's diameter?

Use 3.14 for ​𝜋.

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The circumference of a circle is 59.66 inches. What is the circle's radius?

Use 3.14 for ​𝜋.

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• IXL (VWP) Circumference of circles: exact values

• IXL 7-BB.5 Circumference of circles

Calculating

Area

​The easiest way to calculate area is radius x radius x 3.14

Fill in the Blank

3a - Which is given, the radius or the diameter?

Fill in the Blank

Multiply $$radius\times radius\times3.14$$  to determine the area of the circle.

3b - What is the area of the circle?

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4a - What is the radius of the circle?

Fill in the Blank

4b - What is the area of the circle?

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What is the area of figure 6?

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What is the area of figure 7?

Fill in the Blank

What is the circumference of figure 6?

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Fill in the Blank

What is the circumference of figure 7?

​Complete IXL 7-Y.5 Area of Circles