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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...
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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...
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Printables
Ed Galaxy

Amazing Angles

For Teachers 4th - 9th Standards
Three letter-sized mini posters can be displayed in your elementary geometry class when teaching about angles. One provides information about degree measurement and additive properties, and the other two define acute, right, obtuse,...
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Lesson Plan
Curated OER

Angles

For Teachers 3rd - 5th
Learners identify obtuse and acute angles in comparsion to a right angle. They identify obtuse, acute, and right angles. Pupils use "Shape Measure" to construct obtuse, acute, and right angles. They review line segements to locate right...
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PPT
Curated OER

Angles Lesson 15-2

For Teachers 3rd - 5th Standards
The four major types of angles, right, obtuse, acute, and straight are described in this fine presentation. First, the important vocabulary associated with angles is presented, then the types of angles are described. A protractor is...
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Worksheet
Curated OER

Drawing Angles

For Students 4th - 5th
Get out those protractors! Once geometers can identify obtuse, acute, right, and straight angles, get them to measure and draw their own. There are six boxes here, each with an angle measurement. Learners use a protractor to draw the...
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PPT
Curated OER

The Angles

For Teachers 2nd - 3rd
A very cute presentation on the four types of angles can be found in this resource. Young mathematicians are introduced to obtuse, acute, right, and reflex angles. Charming stick figures are depicted using the angles. Great for use in...
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Lesson Plan
Curated OER

Angles - Digger and the Gang

For Teachers 4th - 6th
Students explore angle estimation and measurement. In this angle lesson, students define obtuse, acute, and right angles, and practice measuring angles using a protractor. Students participate in an online angle estimation activity.
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Lesson Plan
Curated OER

Acute Triangles

For Teachers 4th - 8th
Learners study acute triangles. They measure angles using a protractor, then classify the triangles as either right, obtuse, or acute. Everyone creates a design for a Navajo rug using only acute triangles.
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Lesson Plan
Teachers' Domain

Introduction to Angle Measure

For Teachers 4th - 6th Standards
An all-encompassing package provides video clips that demonstrate real-world activities that have to do with angles. After watching the Cyberchase cartoons, learners discuss why a "v" shape is used to measure a turn. A pair of vital...
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Lesson Plan
Curated OER

Angles All Around Us

For Teachers 4th - 8th
Explore with your class the characteristics of acute, obtuse, right, complementary, and supplementary angles. They take digital photographs around the school and identify the angles in the images. Uisng software, they label and print the...
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Worksheet
Curated OER

Rays and Angles - Homework 16.2

For Students 3rd - 5th
Learners name seven different angles in three different ways and then classify each angle as acute, obtuse, right or straight. They solve one word problem.
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Lesson Plan
Curated OER

Identify and Label Different Types of Angles

For Teachers 3rd - 4th
Students identify and label acute, obtuse, and right angles within a picture. Using Kid Pix software and digital photos, they manipulate, identify, and label the angles and describe the angles to a classmate.
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Lesson Plan
Texas Instruments

Identifying a Triangle by its Sides and Angles

For Teachers 9th - 12th Standards
Identify triangles by their angle measures and side lengths by looking at and measuring angle measures and side lengths. Use Cabri Jr. to construct various triangles, then manipulate the construction to create the 6 types of triangles,...
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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...
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Worksheet
Savvas Learning

Colorful Triangles

For Students 4th - 5th Standards
Learners examine a figure made up of different types of triangles and then determine whether each triangle is right, acute, or obtuse. Next, they color each type of triangle a different color. Finally, pupils answer three fill in the...
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Lesson Plan
EngageNY

Experiments with Inscribed Angles

For Teachers 9th - 10th Standards
Right angles, acute angles, obtuse angles, central angles, inscribed angles: how many types of angles are there? Learners first investigate definitions of inscribed angles, central angles, and intercepted arcs. The majority of the lesson...
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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...
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Worksheet
Curated OER

Acute or Obtuse Angles

For Students 6th - 7th
In this geometry activity, students view ten angles of varying degrees and identify if the angle is acute or obtuse. The students write the answer on the lines provided.s
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Lesson Plan
Curated OER

Identifying Angles

For Teachers 4th - 5th
Young scholars identify names of angles. They use a large clock to demonstrate angles using certain times of day. Given a geoboard, students create figures with acute, right, and obtuse angles.
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Worksheet
Curated OER

Making an Angle Eater

For Students 3rd
Third graders create angle eaters where they use circles with cut outs to identify right, obtuse, and acute angles. Students complete 1 angle eater.
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Worksheet
Curated OER

Three Ways to Name an Angle

For Students 4th - 6th
Learners first name angles in three ways, then classify them as acute, obtuse or right angles. Good practice when introducing the concept of different types of angles.
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Lesson Plan
Curated OER

Know Your Angles

For Teachers 3rd - 7th
Explore types of angles and the characteristics of each. After observing a PowerPoint Presentation, learners tour the school facilities and use a digital camera to capture prescribed angles. Using the digital pictures and written...
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Interactive
Curated OER

Measuring Angles - Pretest Questions

For Students 4th - 6th
Upper graders solve ten multiple choice problems about angles and measuring angles.

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