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# Introduction to Triangles - PowerPoint PPT Presentation

Introduction to Triangles. N. Bekanovic, S. Jordan, N. Moore, A. Prosdocimo. Grade 4/5 Lesson Study #1. What am I?. I can be big or small. You can find me all around. I am made up of three connected lines. I have three vertices I am a polygon. Sailboat. How many triangles can you find?.

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## PowerPoint Slideshow about 'Introduction to Triangles' - ardelis

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### Introduction to Triangles

N. Bekanovic, S. Jordan, N. Moore, A. Prosdocimo

Lesson Study #1

I can be big or small.

You can find me all around.

I am made up of three connected lines.

I have three vertices

I am a polygon.

How many triangles can you find?

How many triangles can you find?

How many triangles can you find?

How many triangles can you find?

How many triangles can you find?

PROCEDURE:

(1) You will be divided into partners.

(2) Each pair will be given a bag of pipe cleaners.

(3) Use these pipe cleaners to make different types of triangles.

(4) There are three colours of pipe cleaners. Each colour represents a different length.

(5) You can use any combination of colours.

(6) Work with your partner to create many different triangles.

(7) You will be given THREE minutes to create these triangles.

(8) Display your triangles flat on the table.

DO NOT BEND, TWIST OR ATTACH ANY PIPE CLEANERS.

### Time for an Observation Walk

(1) This is a chance to take a closer look at each other’s creations.

(3) Make a mental note of the various triangles you observe.

(4) Discussions will take place later in the lesson.

A triangle that has all of its sides equal in length

A triangle that has two sides equal in length

A triangle that has no equal sides

Can you find examples of equilateral triangles?

Can you find examples of isosceles triangles?

Can you find examples of scalene triangles?

### Time to Communicate

What is the difference between an equilateral, scalene and isosceles triangle?