Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles:...

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Types of Triangles Grades 4 and 5, Mathematics

Transcript of Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles:...

Page 1: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Types of TrianglesGrades 4 and 5, Mathematics

Page 2: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

We will discover a rule that states whether or not it is possible to construct triangles from given lengths.

Lesson Objectives

Page 3: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Access this link to learn about triangles and its classifications.

Watch and play

http://www.yteach.co.uk/page.php/resources/view_all?id=triangle_figure_angle_construction_exterior_geometry_t&from=search
Page 4: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

A triangle is a closed figure made from three line segments

Triangles can be classified based on their angles

Classifying Triangles

Acute

Right

Obtuse

Page 5: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Triangles can also be classified based on their sides

Classifying Triangles

Equilateral

Isosceles

Scalene

Page 6: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Use the handouts given to you.

Create your own triangles

http://illuminations.nctm.org/lessons/buildingtriangles/Triangles-AS-WhatsImportant.pdf
Page 7: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Use Math Is Fun to create different triangles.

Draw your own triangles

http://www.mathsisfun.com/geometry/triangles-interactive.html
Page 8: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Can any three lengths be the sides of a triangle?

Class Discussion

Page 9: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

Answer the questions from http://www.ixl.com/math/grade-6/triangle-review

Let’s review

http://www.ixl.com/math/grade-6/triangle-review
http://www.ixl.com/math/grade-6/triangle-review
Page 10: Grades 4 and 5, Mathematics. We will learn how to identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.

End


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