Unit 3

Glossary

Grade 7

area of a circle

The area of a circle is the number of square units it covers. If a circle has radius units, its area is square units.

For example, a circle has radius of 3 inches. Its area is , or , square inches. This is about 28.3 square inches.

used in:

Lesson 7

circle

A circle is made of all the points that are the same distance from a given point. That given point is the center of the circle.

Every point on this circle is 5 cm away from point .

<p>A circle with points A, B, C, D, E, F</p>

used in:

Lesson 2

circumference

The circumference of a circle is the distance around the circle. If a circle has radius units, its circumference is units.

For example, a circle has a radius of 3 inches. Its circumference is , or inches. This is about 18.85 inches.

used in:

Lesson 2

diameter

A diameter is a line segment that goes from one point on a circle to another and passes through the center. The length of this segment is also called the diameter. Every diameter of a circle is the same length.

used in:

Lesson 2

pi ()

There is a proportional relationship between the diameter and circumference of any circle. The constant of proportionality is pi. The symbol for pi is .

This relationship can be represented with the equation , where represents the circumference and represents the diameter. In the graph, pi can be seen as the value of when the value of is 1.

Some approximations for are , 3.14, and 3.14159.

used in:

Lesson 3

radius

A radius is a line segment that goes from the center of a circle to any point on the circle. The length of this segment is also called the radius. Every radius of a circle is the same length.

For example, is the radius of this circle with center .

used in:

Lesson 2

squared

The word squared means “to the second power.” This is because a square with side length has an area of , or .

used in:

Lesson 8

Unit Glossary | Loading...

Unit 3

Glossary

Grade 7

area of a circle

The area of a circle is the number of square units it covers. If a circle has radius units, its area is square units.

For example, a circle has radius of 3 inches. Its area is , or , square inches. This is about 28.3 square inches.

used in:

Lesson 7

circle

A circle is made of all the points that are the same distance from a given point. That given point is the center of the circle.

Every point on this circle is 5 cm away from point .

used in:

Lesson 2

circumference

The circumference of a circle is the distance around the circle. If a circle has radius units, its circumference is units.

For example, a circle has a radius of 3 inches. Its circumference is , or inches. This is about 18.85 inches.

used in:

Lesson 2

diameter

used in:

Lesson 2

pi ()

There is a proportional relationship between the diameter and circumference of any circle. The constant of proportionality is pi. The symbol for pi is .

This relationship can be represented with the equation , where represents the circumference and represents the diameter. In the graph, pi can be seen as the value of when the value of is 1.

Some approximations for are , 3.14, and 3.14159.

used in:

Lesson 3

radius

A radius is a line segment that goes from the center of a circle to any point on the circle. The length of this segment is also called the radius. Every radius of a circle is the same length.

For example, is the radius of this circle with center .

used in:

Lesson 2

squared

The word squared means “to the second power.” This is because a square with side length has an area of , or .

used in:

Lesson 8

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Glossary

area of a circle

circle

circumference

diameter

pi ()

radius

squared

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Navigation

Gradeband

Course

Unit

Settings

Language

Audience

Assessment Access

Glossary

area of a circle

circle

circumference

diameter

pi ()

radius

squared