Introduction
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Introduction Topic: Classifyi ng Triangle s
description
Introduction. Topic: Classifying Triangles. Objective. Students will identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute. Materials. Brainpop Movie on triangles http://www.brainpop.com/math/geometryandmeasurement/typesoftriangles/ - PowerPoint PPT Presentation
Transcript of Introduction
Introduction
Topic:
Classifying Triangles
Objective
Students will identify, describe, and compare triangles: isosceles, right, equilateral, scalene, obtuse, and acute.
Materials
1. Brainpop Movie on triangles http://www.brainpop.com/math/geometryandmeasurement/typesoftriangles/
2. Promethean Flipchart :Classifying Triangles
3. Illuminations: Resources for Teaching Math Lesson on “What’s so important about Triangles?”
4. Grid paper
5. Tape
Explanation of the Concept
Equilateral Triangle
A triangle which has all three of its sides and angles equal in size.
Isosceles Triangle
A triangle which has two of its sides and angles equal in size.
Scalene Triangle:
A triangle which has all of its sides different in size.
Right-angled Triangle
A right triangle or right-angled triangle is a triangle in which one angle is a right angle (that is, a 90-degree angle).
Acute-angled Triangle
An acute-angled triangle has all angles less than 90º (i.e. all three angles are acute).
Obtuse-angled Triangles
An obtuse-angled triangle has one angle greater than 90º. That is, one angle is obtuse.
Instructions
1. Create different triangles with specified measurements using grid paper and tape.
2. Label the triangles with the letters.
3. Also identify the type of triangle they made.
Wrap up (plenary)
Think of any one rule about triangles.
