Let's do this problem.
Name each of the triangles in two ways.
All right, this is a very basic question, but it'll help you to solidify your fundamentals.
Let's do it together.
We have this triangle over here.
You can see that two sides are equal.
So therefore, this is an isosceles triangle, right?
Now, what about this triangle over here?
You can see that all the three sides are of different measure.
Therefore, this is a scaling triangle.
Right.
OK, what about this triangle?
Two sides are equal.
Therefore, this is an isosceles triangle.
And over here also, you can see that two sides are equal.
This is an isolationist triangle.
And in this triangle over here, you can see that all the three sides are equal.
Therefore, this is an equilateral triangle.
So we have classified the given five triangles on the basis of sides.
Now, let's do it on the basis of angles.
Over here you can see that all the angles are acute angles or less than 90 degrees.
Therefore, this is an acute angle triangle.
What about this triangle over here?
You can see that one angle is 90 degrees.
Therefore, this is a right angle triangle.
What about this triangle over here?
You can see that one angle.
This angle over here is greater than 90 degrees.
Right?
So that's an obtuse angle.
Therefore, this triangle is an obtuse angle triangle.
What about this triangle?
Over here?
You can see a 90 degree angle is there in this triangle.
Therefore, this is the right angle triangle.
And in this triangle, you can see that all the angles are acute angles.
And because it's an equilateral triangle, we know that all these angles will be equal to 60 degrees,
which is less than 90 degrees or acute angles.
Therefore, this triangle over here is an acute angle triangle.