Unit Plan
Virginia Department of Education

#### Classifying Angles

For Teachers 4th - 8th Standards
Don't be obtuse, this geometry unit is the just the right resource for educating the acute young minds in your class. From classifying and measuring angles, to determining the congruence of shapes, this resource covers a wide range of...
Interactive
Scholastic

#### Study Jams! Classify Angles

For Students 4th - 8th Standards
What a great introduction to the world of angles. See the different types of angles and their corresponding degree measurements. Use the provided assessment to test understanding with a variety of questions.
Lesson Plan
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Illustrative Mathematics

#### The Geometry of Letters

For Teachers 3rd - 5th Standards
Use the alphabet as a tool for teaching your class about geometric figures. Break apart capital letters into line segments and arcs. Classify angles as right, acute, or obtuse. Identify parallel and perpendicular lines. An excellent...
Worksheet
Curated OER

#### Classifying Angles Online

For Students 5th - 6th
In this online classifying angles worksheet, students work out the answers to sixteen math questions and fill in the boxes with their answers. Students check their answers online as they go and the computer calculates the overall score...
Lesson Plan
Utah Education Network (UEN)

#### The Angle Tangle

For Teachers 4th - 5th Standards
Fourth and fifth graders identify three types of angles, recognize that angles are measured in degrees, measure angles using protractors or angle rulers. They classify angles as a class, classify angles on pattern blocks, and complete a...
Worksheet
Curated OER

#### Classifying Angles

For Students 7th
In this classifying angles worksheet, 7th graders identify and complete 17 different angles illustrated on the sheet. First, they use the key given to outline each angle. Then, students use a protractor to measure each angle and...
Worksheet
Kuta Software

#### Classifying Angles

For Students 6th - 10th Standards
Learners sharpen their classification of angles skill with a simple angles worksheet that starts with unlabeled angles and ends with specific angle measures to classify.
Lesson Plan
Curated OER

#### Angles

For Teachers 4th - 5th
Fourth and fifth graders investigate angles and name them according to the criteria for obtuse, acute, and right angles. They examine a human-made yarn pattern on the floor of their classroom and identify angles, vertices, and types of...
Worksheet
Curated OER

#### Angles (Various)

For Students 4th - 5th
In this angles worksheet, learners analyze a group of 8 angles. There are no directions for use, but students could measure these with a protractor or classify them as acute, right or obtuse.
Worksheet
Curated OER

#### Classifying Angles Worksheet

For Students 3rd - 6th
In this angles worksheet, students classify angles as being acute, right, obtuse, or straight. Students classify 9 angles on this worksheet.
Worksheet
Mt. San Antonio Collage

#### Postulates, Angles, and Their Relationships

For Students 8th - 11th Standards
More than a worksheet, learners go through geometry topics example by example on the nicely organized handout. From postulates to classifying angles, there are rules and examples provided for each topic. The ten pages of problems provide...
Worksheet
Curated OER

#### Acute and Obtuse Angles

For Students 4th - 5th Standards
Take a look at these angles: What kind are they? Give mathematicians practice identifying obtuse, acute, and right angles in this categorizing activity. Each type is pictured and explained at the top, and scholars examine nine sample...
Interactive
Curated OER

#### Measuring Angles - Pretest Questions

For Students 4th - 6th
Upper graders solve ten multiple choice problems about angles and measuring angles.
Lesson Plan
University of Exeter

#### Angles and Turns

For Teachers 4th - 7th Standards
Junior geometers investigate the concepts of angles and turns using straws to perform a hands on activity. This is helpful for kinesthetic learners who have a hard time with mathematics. The lesson includes the dialogue to be used during...
PPT
Curated OER

#### Classifying Triangles

For Teachers 3rd - 5th
If you're looking for a presentation to assist you in your teaching of triangles, this one could be for you. In it, learners are shown how triangles are classified by the size of their angles and by their sides. These are tricky concepts...
Worksheet
Nuffield Foundation

#### Angles

For Students 7th - 10th
Your learners practice the foundations of measuring two-dimensional angles. As well as the explanation of how to measure angles and their classifications, learners have plenty of practice problems on this worksheet.
Worksheet
Curated OER

#### Classifying Angles

For Students 10th
In this classifying angles worksheet, 10th graders solve and complete 21 various types of problems. First, they use the diagram shown on the right to answer the questions that follow. Then, students solve for x and find the measure of...
Printables
K-5 Math Teaching Resources

#### Angles Template

For Students 4th - 6th Standards
Young mathematicians learn to see geometry from different angles with this simple printable resource. Providing multiple visual examples of angles, this simple document can be used as an instructional tool, a skills practice exercise, or...
Lesson Plan
Curated OER

#### Lesson 3: Measuring Angles

For Teachers 3rd - 5th
Students use a protractor to measure angles. They classify angles by type: right angle, acute angles, and obtuse angles. Students build and draw right, acute, and obtuse angles. They discuss how do people in various professions use...
Activity
Exploratorium

#### Angle Hunting

For Teachers 4th - 6th Standards
Do angles change with distance? Using a previously made tool, individuals find and measure angles on a playground. They observe that angles are the same measure regardless of the distance at which they're measured.
Handout
McGraw Hill

#### Lines and Angles

For Students 4th - 7th Standards
Why was the obtuse angle upset? Because it was never right! A valuable resource is loaded with background information on types of angles and lines. Learners review the characteristics of parallel, perpendicular, and intersecting lines,...
Lesson Plan
Scholastic

For Teachers 4th - 5th Standards
Identifying types of angles meets real-world application in an excellent, hands-on geometry activity. Learners use pipe cleaners and a visual model to independently discover the acute, right, or obtuse angles in their classroom, which...
Worksheet
Curated OER

#### Estimate then Measure the Angle #1

For Students 4th - 6th
Practice angle estimation with a worksheet. First learners estimate three angles within 15 degrees, then they measure and name each angle. A reference website is given for additional activities.
Worksheet
Curated OER

#### Measure, Draw, and Classify Angles: Homework

For Students 7th
In this angles instructional activity, 7th graders review the definitions for a right angle, acute angle, obtuse angle, and straight angle. Students then use symbols to name each angle three different ways. Students classify each angle...