Circles

Labeling

Label each part of the circle.

Drag labels to their correct position on the image

Diameter

Chord

Radius

Center

Labeling

Label each part of the circle.

Drag labels to their correct position on the image

Diameter

Center

Chord

Radius

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

Dropdown

To change a radius to a diameter,​

Select answer

the ​

Select answer

by

Select answer

.

Dropdown

To change a radius to a diameter,​

Select answer

the ​

Select answer

by

Select answer

.

Multiple Choice

The radius is _____ the diameter.

• Double

• Half

• Equal to

• Three times

Dropdown

To change a diameter to a radius,​

Select answer

the ​

Select answer

by

Select answer

.

Dropdown

To change a diameter to a radius,​

Select answer

the ​

Select answer

by

Select answer

.

​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?

Fill in the Blanks

What is the diameter for question 5?

Fill in the Blanks

What is the radius for question 5?

Fill in the Blanks

What is the diameter for question 11?

Fill in the Blanks

What is the radius for question 11?

Calculating Circumference

Dropdown

The circumference can be calculated by ​

Select answer

​

Select answer

by ​

Select answer

.

Dropdown

The circumference can be calculated by ​

Select answer

​

Select answer

by ​

Select answer

.

Dropdown

If the radius is given instead of the diameter, the circumference can be calculated by ​

Select answer

​​

Select answer

by ​

Select answer

, then by

Select answer

.

Dropdown

If the radius is given instead of the diameter, the circumference can be calculated by ​

Select answer

​​

Select answer

by ​

Select answer

, then by

Select answer

.

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?

Circle: C=2πr or C=πd;

A=πr²

Math Response

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

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 12\pi

Deg^°

Rad

Fill in the Blanks

3c - What is the circumference of the circle (using 3.14 for π)?

Circle: C=2πr or C=πd;

A=πr²

Math Response

Let's go for it!

4 - What is the circumference of the circle in terms of π?...

Circle: C=2πr or C=πd;

A=πr²

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 (using 3.14 for π)?

Circle: C=2πr or C=πd;

A=πr²

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 π?

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 8\pi

Deg^°

Rad

Fill in the Blanks

6c - What is the circumference of the circle (using 3.14 for π)?

Circle: C=2πr or C=πd;

A=πr²

Math Response

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

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 10\pi

Deg^°

Rad

Fill in the Blanks

7b - What is the circumference of the circle?

Circle: C=2πr or C=πd;

A=πr²

Calculating the diameter and radius when given the circumference​

Go backwards!​

1. Divide the circumference by Π  (or 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?

Circle: C=2πr or C=πd;

A=πr²

Fill in the Blanks

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

Circle: C=2πr or C=πd;

A=πr²

​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.

Circle: C=2πr or C=πd;

A=πr²

Fill in the Blanks

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

Use 3.14 for ​𝜋.

Circle: C=2πr or C=πd;

A=πr²

Fill in the Blanks

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

Use 3.14 for ​𝜋.

Circle: C=2πr or C=πd;

A=πr²

Fill in the Blanks

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

Use 3.14 for ​𝜋.

Circle: C=2πr or C=πd;

A=πr²

• IXL (VWP) Circumference of circles: exact values

• IXL 7-BB.5 Circumference of circles

Calculating

Area

Dropdown

To calculate the area of a circle...



​

Select answer

the​

Select answer

by​ the

Select answer

, then by ​

Select answer

Dropdown

To calculate the area of a circle...



​

Select answer

the​

Select answer

by​ the

Select answer

, then by ​

Select answer

Fill in the Blanks

3a - What is the radius of this circle?

Math Response

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

3b - What is the area of the circle in terms of π?

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 36\pi

Deg^°

Rad

Fill in the Blanks

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

3c - What is the area of the circle?

Circle: C=2πr or C=πd;

A=πr²

Fill in the Blanks

4a - What is the radius of the circle?

Math Response

4b - What is the area of the circle in terms of π?

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: \pi

Deg^°

Rad

Fill in the Blanks

4b - What is the area of the circle?

Circle: C=2πr or C=πd;

A=πr²

Math Response

What is the area of figure 6 in terms of π?

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 4\pi

Deg^°

Rad

Fill in the Blanks

What is the area of figure 6 (use 3.14 for π)?

Circle: C=2πr or C=πd;

A=πr²

Math Response

What is the circumference of figure 7 in terms of π?

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 25\pi

Deg^°

Rad

Math Response

What is the circumference of figure 7 (use 3.14 for π)?

Circle: C=2πr or C=πd;

A=πr²

Type answer here

Correct Answer: 78.5

Deg^°

Rad

​Complete IXL 7-Y.5 Area of Circles