Lesson Plan
Curated OER

Study Buddies: Classifying Triangles

For Teachers 4th - 5th
In this math worksheet, students analyze an informative chart about the measurement and angles of equilateral, isosceles and scalene triangles. Students then answer 5 questions about classifying triangles.
Worksheet
Raytheon

Just Measure It

For Students 5th - 7th
In this line segments and angles instructional activity, students solve problem solving problems and multiple choice questions about line segments and angles. Students complete 7 pages of problems.
Worksheet
Curated OER

Classifying Angles Online

For Students 5th - 6th
In this online classifying angles activity, 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 on...
Worksheet
Curated OER

Triangle Designs

For Students 4th - 6th
In this triangles instructional activity, students draw different triangles and write how many sides and angles each one has. Students draw 4 kinds of triangles and have 2 that are impossible to draw.
Lesson Plan
Curated OER

Investigation - Adrienne's Pattern Block Angles

For Teachers 5th
Fifth graders investigate possible solutions to a word problem. They explore properties of polygons and right angles. Students demonstrate proper angle measurement. Students discover patterns.
Worksheet
Curated OER

Angles Measure and Classify

For Students 5th - 6th
For this angles worksheet, learners solve 6 problems in which an angle is measured with a protractor. Students mark if the angle is acute, right, obtuse or straight.
Lesson Plan
Curated OER

Classify and Measure the Angles

For Teachers 5th - 7th
In this measuring angles worksheet, students use protractors to measure 9 angles and classify them as obtuse, straight, acute or right angles.
Printables
1
1
Houghton Mifflin Harcourt

Unit 6 Math Vocabulary Cards (Grade 5)

For Students 5th Standards
Acute angles, nets, and vertices are only a few terms that a set of flash cards includes. Among the 108 cards, two types are available; word cards printed in bold-faced lettering, and corresponding definition cards equipped with an...
Lesson Plan
Curated OER

Working With Angles

For Teachers 4th - 5th
In this math worksheet, students collaborate with a "study buddy" or "coach" to learn whether an angle is acute, obtuse or right. Students follow the directions to go through the process of deciding what classification an angle has....
Lesson Plan
Curated OER

Toothpick Triangles

For Teachers 4th - 8th
Students draw a chart (included in the lesson) to use with their investigation. They review terminology of triangles and receive toothpicks to use in the lesson. Beginning with three toothpicks, students form a triangle. They complete...
Lesson Plan
Curated OER

Angles

For Teachers 5th
Fifth graders identify different angles according to its type that is determined according to taking a measurement of the degree. They also explore the vocabulary related to the concept.
Worksheet
Curated OER

Classify Angles Worksheet

For Students 5th - 6th
In this angle classification worksheet, students solve 8 problems in which an angle measurement in degrees is analyzed. Students classify each angle as right, obtuse, or acute.
Lesson Planet Article
Curated OER

Measuring Angles

For Teachers 3rd - 5th
Identifying and measuring angles with a protractor can provide a fun way for students to learn this mathematical concept.
Worksheet
Curated OER

Identify Angles: Obtuse, Right, Straight and Acute

For Students 5th - 6th
For this triangle worksheet, students identify angles as either obtuse, right, straight or acute. A reference web site is given for additional activities.
Printables
K-5 Math Teaching Resources

Triangle Pack

For Teachers 4th - 6th Standards
With so many different types of triangles, it can be a challenge for young mathematicians to keep them all straight. Luckily this set of printable triangles is here to engage children in comparing and sorting triangles by their...
Worksheet
Curated OER

Identify Triangles: Acute, Right, Obtuse, Straight

For Students 5th - 6th
In this triangles activity, students draw angles with given measurements and identify each as either acute, right, obtuse or straight. A reference web site is given for additional activities. 
Worksheet
Curated OER

Angles measure and classify

For Students 5th - 8th
In this angles learning exercise, students measure angles with a protractor and figure out if it is acute, right, obtuse, or straight. Students complete 6 problems.
Worksheet
Curated OER

How Do We Measure Angles

For Students 4th - 5th
In these angles and geometry worksheets, students learn about different kinds of angles, angle measurement, and other geometry facts. Students complete 15 questions.
Lesson Plan
Curated OER

An Introduction to Angles

For Teachers 4th - 8th
Students identify and create angles. For this angle measurement lesson, students use sticks to make models of angles, then measure and name each angle.
Worksheet
Curated OER

Identifying Triangles

For Students 5th - 7th
In this triangles practice worksheet, students respond to 4 questions that require them to identify the pictured triangles as acute, right, or obtuse triangles.
Worksheet
Curated OER

Angle Comparison to Right Angles

For Students 5th - 6th
In this angles worksheet, students solve 4 problems in which an angle is analyzed and measured. Students tell if each angle is greater than, less than or equal to a right angle.
Worksheet
Curated OER

Learning About Triangles

For Students 4th - 6th
Upper graders label four triangles and fill in the labels correctly. They draw three original triangles and answer the questions about them.
Lesson Plan
Curated OER

Angle Action

For Teachers 5th - 7th
Young scholars measure and label specified angles. In this angles activity, students use a protractor to find angles that are acute, obtuse, and reflexive. Young scholars then label each angle and match the angles the correct definition....
Worksheet
Curated OER

Measuring Angles

For Students 5th - 6th
In this measuring angles worksheet, students solve 10 problems in which angles are measured with a protractor and labeled with: acute, obtuse, right.

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