Lesson start ideas	Give a creative idea how to begin a lesson
Which subject	Mathematics
What age group	Year or Grade 7
What topic	classifying triangles
Quantity	1
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Introduction

Welcome class! Today, we're going to dive into the wonderful world of classifying triangles. But before we get started, let's take a moment to think about why we care about triangles in the first place.

Why Triangles Matter

Did you know that triangles are one of the most important shapes in mathematics? They show up everywhere, from measuring distances to calculating areas and volumes. But more than that, understanding the properties of triangles can help us understand many other shapes as well.

The Three Types of Triangles

Now that we understand why triangles are important, let's take a look at the three different types of triangles:

1. Equilateral triangles - these are triangles where all three sides are equal in length.
2. Isosceles triangles - these triangles have two sides that are equal in length, and one side that is different.
3. Scalene triangles - these triangles have three sides of different lengths.

Identifying Triangles

Now that we know the different types of triangles, we can start to identify them in real-world situations. For example, if we see a triangle where all three sides are equal, we can automatically identify it as an equilateral triangle.

Conclusion

And that brings us to the end of our lesson on classifying triangles! Remember, triangles are all around us, and understanding their properties can help us understand many other shapes as well. Keep practicing, and you'll soon be an expert in no time!