Lesson Plan
Curated OER

Classifying Triangles Based On Properties of Angles

For Teachers 5th Standards
The interactive lesson plan featured here calls for the use of a Smartboard for sorting and classifying shapes. Then, pupils discuss the rules they followed for sorting their shapes, particularly focusing on the properties of angles....
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.
Lesson Plan
Curated OER

The Greedy Triangle-Intro to Geometric Shapes

For Teachers 4th - 6th Standards
 In this geometry lesson, learners read The Greedy Triangle and use geoboards to construct geometric shapes. They identify the number of sides and angles each shape has.
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.
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...
Printables
1
1
K-5 Math Teaching Resources

2-D Shape Cards

For Students K - 5th Standards
Add some visual support to your elementary geometry lessons with this set of printable shape cards. From triangles and squares to octagons and nanogons, this simple resource can be used in countless ways to develop children's knowledge...
Worksheet
Curated OER

Identify Triangles

For Students 3rd - 5th
In thins triangles review worksheet, students examine 3 triangles and their measurements. Students classify them as acute, right, obtuse, equilateral, isosceles, or scalene.
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

Triangles Word Search

For Students 5th - 6th
In this word search instructional activity, students locate 7 types of triangles. Triangles include isosceles, acute, equilateral, right, and obtuse.
Worksheet
Curated OER

Identify Triangles #

For Students 4th - 6th
In this triangle worksheet, students identify triangles as scalene, equilateral, right, obtuse, acute or isosceles. A reference web site is given for additional activities.
Worksheet
Curated OER

Identify Triangles

For Students 4th - 6th
In this triangle worksheet, learners check the correct answer, identifying triangles as either right, obtuse, acute, scalene, isosceles or equilateral. A reference web site is given for additional activities.
Interactive
Curated OER

Try These Angles! Exploring Angles: Post Test

For Students 5th - 8th
In this angles worksheet, students answer multiple choice questions about angles on their own and angles inside shapes. Students complete 10 multiple choice questions.
Interactive
Curated OER

Try These Angles! Exploring Angles

For Students 5th - 8th
In this angles instructional activity, students answer multiple choice questions about different types of angles in shapes. Students complete 10 questions.
Lesson Plan
Curated OER

Triangle Puzzler

For Teachers 5th - 8th
Students are introduced to some basic concepts of geometry. They explain that the definition of a triangle is a figure with three sides, three angles, and three points. Triangles can be named by using three points in their correct sequence.
Lesson Plan
Curated OER

Equilateral Triangles

For Teachers 4th - 5th
Students examine the attribute of equilateral triangles. In this equilateral triangle lesson, students examine a number of paper triangles to determine how they are classified. They determine how triangles are depicted in Navajo rugs.
Worksheet
Curated OER

Angles

For Students 5th - 8th
In this angles worksheet, learners answer multiple choice questions about different types of angles and measurements of angles. Students complete 6 questions total.
Worksheet
Curated OER

Identify Triangles #3

For Students 3rd - 5th
In this triangle activity, students identify triangles as obtuse, right, or acute, checking the correct answer. A reference web site is given for additional activities.
Lesson Plan
Houghton Mifflin Harcourt

Introducing the Concept: Triangles and Quadrilaterals

For Teachers 5th - 7th Standards
Guide your geometers through the process of constructing polygons. They learn how to draw triangles, squares, parallelograms, rectangles, rhombuses, and trapezoids with specified angles using a protractor and a ruler. The lesson plan...
Lesson Plan
Curated OER

Geometry Straws

For Teachers 3rd - 8th
Students create different angles and shapes by using different lengths of straws. In this geometry straws lesson plan, students glue straws onto paper and define what they have made.
Worksheet
Curated OER

Identify Triangles

For Students 5th - 6th
In this triangle worksheet, students identify triangles as either, right, acute, obtuse, equilateral, scalene or isosceles. A reference web site is given for additional activities.
Worksheet
Curated OER

Identifying Triangles

For Students 4th - 6th
In this triangle worksheet, students label triangles as acute, right, obtuse, scalene, equilateral or isosceles. A reference web site is given for additional activities.
Worksheet
Curated OER

Identify Triangles #2

For Students 5th - 6th
In this triangle worksheet, students identify a set of triangles as either acute, right or obtuse, checking the appropriate box beneath each. A reference web site is given for additional activities.
Worksheet
Curated OER

Identify Triangles

For Students 4th - 6th
In this triangles worksheet, students identify triangles as either Acute, right or obtuse. A reference web site is given for additional activities.
Worksheet
Curated OER

Identifying Types of Triangles

For Students 5th - 6th
In this triangle worksheet, learners check the appropriate label for triangles: right, acute, obtuse, scalene, isosceles or equilateral. A reference web site is given for additional activities.

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