In this lesson, we will learn about scalene triangles...
About This Lesson
In this lesson, we will:
- learn what are scalene triangles.
- see some examples on identifying them.
The study tips below will give you a short summary on this.
The math video below will explain in depth about this. Furthermore, it will show some examples so that you can understand this lesson better.
When a triangle has three sides (edges) of different lengths, this triangle can be called a scalene triangle. See some examples below:
Since this type of triangle has three sides of different lengths, all of its internal angles will be different as well. See the picture below:
The math video below will explain more...
Math Video Transcript
In this lesson, we will learn about scalene triangle (ST).
A triangle is a ST, when all the sides of the triangle, have different lengths..
Now, to demonstrate this, let's move vertex 'C' to the left.
Here, we can see that, all the 3 sides of this triangle have different lengths. Hence, this is a ST.
It is important to note that, the interior angles will also be different.
Let's continue to move point ‘C’.
Now, when these two sides have the same length, it is not a ST.
As we continue to move 'C', we will get a right triangle.
A right triangle, can also be a ST, when the length of each side is different.
However, it will not be a scalene, if two of its sides, have the same length.
Let's see some examples.
Is this a ST?
Since this triangle has 3 sides of different lengths, this is a ST.
Next example. How about this triangle?
We can see that, these angles are not the same.
This means that, these 3 sides must have different lengths.
Hence, this is a ST.
Last example. Now, these 2 sides have the same length.
Therefore, this is not a ST.
That is all for this lesson.
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