Circles Area Deconstructed

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

Labeling

Label each part of the circle.

Drag labels to their correct position on the image

Chord

Radius

Center

Diameter

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.

Fill in the Blanks

What is the radius for question 2?

Fill in the Blanks

What is the diameter for question 2?

Fill in the Blanks

What is the radius for question 4?

Fill in the Blanks

What is the diameter for question 4?

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What is the radius for question 5?

Fill in the Blanks

What is the diameter for question 5?

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What is the radius for question 11?

Fill in the Blanks

What is the diameter for question 11?

Calculating Circumference

Multiple Choice

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

• radius

• diameter

• circumference

Fill in the Blanks

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 Blanks

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 Blanks

Let's go for it!

4 - What is the circumference of the circle?

Fill in the Blanks

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 Blanks

6c - What is the circumference of the circle?

Math Response

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

Type answer here

Correct Answer: 10\pi

Deg^°

Rad

Fill in the Blanks

7b - What is the circumference of the circle?

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.

Fill in the Blanks

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

Fill in the Blanks

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.

Fill in the Blanks

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

Use 3.14 for ​𝜋.

Fill in the Blanks

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

Use 3.14 for ​𝜋.

Fill in the Blanks

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

Use 3.14 for ​𝜋.

Fill in the Blanks

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

Use 3.14 for ​𝜋.

• 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 Blanks

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

Fill in the Blanks

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

3b - What is the area of the circle?

Fill in the Blanks

4a - What is the radius of the circle?

Fill in the Blanks

4b - What is the area of the circle?

Fill in the Blanks

What is the area of figure 6?

Fill in the Blanks

What is the area of figure 7?

Fill in the Blanks

What is the circumference of figure 6?

Fill in the Blanks

What is the circumference of figure 7?

​Complete IXL 7-Y.5 Area of Circles