## CCSS.MATH.CONTENT.4.MD.C.5 Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement.

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Description

In this module, students analyze the geometric properties of road signs. This includes studying triangular, quadrilateral, and other polygon forms in such familiar signs as the stop sign, the yield sign, and many other examples.

### Definition--Angle Concepts--Acute Angle

Definition--Angle Concepts--Acute Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

Definition | Angle Concepts | Adjacent Angles

This is a collection of definitions related to Angles. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Alternate Exterior Angles

Definition--Angle Concepts--Alternate Exterior Angles

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Alternate Interior Angles

Definition--Angle Concepts--Alternate Interior Angles

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Angle

Definition--Angle Concepts--Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Angle Bisector

Definition--Angle Concepts--Angle Bisector

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Angle Measure

Definition--Angle Concepts--Angle Measure

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Angle Vertex

Definition--Angle Concepts--Angle Vertex

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Central Angle

Definition--Angle Concepts--Central Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

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

Definition--Angle Concepts--Circumscribed Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Complementary Angle

Definition--Angle Concepts--Complementary Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Congruent Angles

Definition--Angle Concepts--Congruent Angles

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Corresponding Angles

Definition | Angle Concepts | Corresponding Angles

This is a collection of definitions related to Angles. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Exterior Angle

Definition--Angle Concepts--Exterior Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

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

Definition--Angle Concepts--Inscribed Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Obtuse Angle

Definition--Angle Concepts--Obtuse Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Opposite Interior Angles

Definition--Angle Concepts--Opposite Interior Angles

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Reflex Angle

Definition--Angle Concepts--Reflex Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle

### Definition--Angle Concepts--Right Angle

Definition--Angle Concepts--Right Angle

This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.

Definition of an Angle