# Angles

Learn and practice identifying, drawing and, measuring different types of angles and become an expert in angles with interactive resources from GeoGebra.

## Upper Elementary

GRADES 4-5

### Adding and Subtracting Angles

Use addition and subtraction to find unknown measures of non-overlapping angles.

### Angles

Identify and label the vertex, rays, and interior and exterior of an angle. Use appropriate naming conventions to identify angles.

### Drawing and Measuring Angles with a Protractor

Draw and measure angles using a protractor. Understand that a circle measures 360 degrees.

### Types of Angles

Identify and draw angles (acute, right, obtuse, and straight).

## Middle School

GRADES 6-8

### Angle Sum Properties of Triangles, Quadrilaterals, and Polygons

Use a variety of triangles, quadrilaterals, and other polygons to draw conclusions about the sum of the measures of the interior angles.

### Complementary and Supplementary Angles

Define and identify complementary and supplementary angles.

### Lines and Angles

Define and identify alternate interior, alternate exterior, corresponding, adjacent and vertical angles.

### Pairs of Angles

Use properties, definitions, and theorems of angles and lines to solve problems related to adjacent, vertical, complementary, supplementary, and linear pairs of angles.

Exploration

GR. 6-8

#### Unknown Complementary Angles

Practice

GR. 6-8

#### Finding Unknown Complementary Angles

Exploration

GR. 6-8

#### Unknown Supplementary Angles

Practice

GR. 6-8

#### Finding Unknown Supplementary Angles

Exploration

GR. 6-8

#### Unknown Vertical Angles

Practice

GR. 6-8

#### Finding Unknown Values in Vertical Angles

Exploration

GR. 6-8

#### Unknown Adjacent Angles

Practice

GR. 6-8

#### Finding Unknown Values in Adjacent Angles

### Using Theorems for Angles Formed by Parallel Lines

Use definitions and theorems of angles formed when a transversal intersects parallel lines.

## High School

GRADES 9-12

### Degree and Radian Measure of Angles

Determine the measure of an angle in degree mode or in radian mode.

### Related Topics

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