## CCSS.MATH.CONTENT.4.MD.C.5.A - An angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a "one-degree angle," and can be used to measure angles.

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Thumbnail Image Title Description Curriculum Nodes

### Definition--Circle Concepts--Arc Length

Definition--Circle Concepts--Arc Length

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Area of a Circle

Definition | Circle Concepts | Area of a Circle

This is part of a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Center of a Circle

Definition--Circle Concepts--Center of a Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Chord

Definition--Circle Concepts--Chord

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circle

Definition | Circle Concepts | Circle

This is part of a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circle Inscribed in a Square

Definition--Circle Concepts--Circle Inscribed in a Square

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circle Inscribed in a Triangle

Definition--Circle Concepts--Circle Inscribed in a Triangle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circles on a Coordinate Plane

Definition--Circle Concepts--Circles on a Coordinate Plane

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circular Arc

Definition--Circle Concepts--Circular Arc

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circular Composite Figures

Definition--Circle Concepts--Circular Composite Figures

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circular Cross-Sections

Definition--Circle Concepts--Circular Cross-Sections

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circular Functions

Definition--Circle Concepts--Circular Functions

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circular Models

Definition--Circle Concepts--Circular Models

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circular Numerical Models

Definition--Circle Concepts--Circular Numerical Models

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circumcenter of Triangle

Definition--Circle Concepts--Circumcenter of Triangle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circumference

Definition--Circle Concepts--Circumference

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Circumscribed Angle

Definition--Circle Concepts--Circumscribed Angle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Concentric Circles

Definition--Circle Concepts--Concentric Circles

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Diameter

Definition--Circle Concepts--Diameter

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Equation of a Circles

Definition--Circle Concepts--Equation of a Circles

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Hexagon Inscribed in a Circle

Definition--Circle Concepts--Hexagon Inscribed in a Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Incenter of a Triangle

Definition--Circle Concepts--Incenter of a Triangle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Inscribed Angle

Definition--Circle Concepts--Inscribed Angle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Inscribed Angle Theorem

Definition--Circle Concepts--Inscribed Angle Theorem

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Point of Tangency to a Circle

Definition--Circle Concepts--Point of Tangency to a Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Radius of a Circle

Definition | Circle Concepts | Radius of a Circle

This is part of a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Ratio of Circumference to Diameter

Definition--Circle Concepts--Ratio of Circumference to Diameter

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Secant to a Circle

Definition--Circle Concepts--Secant to a Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Sector

Definition--Circle Concepts--Sector

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Square Inscribed in a Circle

Definition--Circle Concepts--Square Inscribed in a Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Tangent Circles

Definition--Circle Concepts--Tangent Circles

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Tangent Line

Definition--Circle Concepts--Tangent Line

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Triangle Inscribed in a Circle

Definition--Circle Concepts--Triangle Inscribed in a Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Definition--Circle Concepts--Unit Circle

Definition--Circle Concepts--Unit Circle

This is a collection of definitions related to circles and related topics.

Definition of a Circle

### Instructional Resource--Geometric Construction--Constructing an Egg Shape

Instructional Resource | Geometric Construction | An Egg Shape

In this instructional resource, we show the steps in constructing an egg shape.

Geometric Constructions with Circles

### Math Clip Art--Angle Illustrations--Adjacent Angles--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Adjacent Angles--Unlabeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Angle Bisector--Labeled

Math Clip Art--Angle Illustrations--Angle Bisector--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Angle Bisector--Unlabeled

Math Clip Art--Angle Illustrations--Angle Bisector--Unlabeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Angle--Labeled

Math Clip Art--Angle Illustrations--Angle--Labeled

This is part of a collection of clip art images showing different types of angles. Each type of angle measure includes a labeled and unlabeled version.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Angle--Unlabeled

Math Clip Art--Angle Illustrations--Angle--Unlabeled

This is part of a collection of clip art images showing different types of angles. Each type of angle measure includes a labeled and unlabeled version.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Complementary Angles--Labeled

Math Clip Art--Angle Illustrations--Complementary Angles--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Complementary Angles--Unlabeled

Math Clip Art--Angle Illustrations--Complementary Angles--Unlabeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Exterior Angle of a Triangle--Labeled

Math Clip Art--Angle Illustrations--Exterior Angle of a Triangle--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Exterior Angle of a Triangle--Unlabeled

Math Clip Art--Angle Illustrations--Exterior Angle of a Triangle--Unlabeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Obtuse Angle--Labeled

Math Clip Art--Angle Illustrations--Obtuse Angle--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Obtuse Angle--Unlabeled

Math Clip Art--Angle Illustrations--Obtuse Angle--Unlabeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Supplementary Angles--Labeled

Math Clip Art--Angle Illustrations--Supplementary Angles--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Supplementary Angles--Unlabeled

Math Clip Art--Angle Illustrations--Supplementary Angles--Unlabeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes

### Math Clip Art--Angle Illustrations--Vertical Angles--Labeled

Math Clip Art--Angle Illustrations--Vertical Angles--Labeled

This is part of a collection of clip art images showing different types of angles.

Angles and Applications of Angles and Planes