Classification of Triangles

Classify the following triangle in two different ways:

$50°, 50°, 80°$

Classify the following triangle in two different ways.

$90°, 45°, 45°$

Classify the following triangle in two different way.

$50°, 40°, 90°$

Classify the following triangle in two different ways:
$60°$, $60°$, $60°$

In a square $\mathrm{ABCD}$, the diagonals bisect at $\mathrm{O}$. What type of triangle $△\mathrm{AOB}$ is? (Right angled triangle/Isosceles right angled triangle)

In Fig. name all the triangles and classify them into:

Obtuse-angled triangles

In Fig. name all the triangles and classify them into:

Isosceles triangles

In Fig. name all the triangles and classify them into:

Right-angled triangles

Can a scalene triangle be right angled?

Can an obtuse-angled triangle be isosceles? (Yes/No)

Can a right-angled triangle be equilateral? (Write Yes/No)

What can you say about the other two angles of a right-angled triangle?

Classify the following triangle in two different way:
$110°$,$50°$, $20°$

Can an isosceles triangle be right-angled?

Name the smallest regular polygon. What is the measure of each of its interior angles?

Name an acute-angled triangle.

Name an obtuse-angled triangle.

Name a right-angled triangle.

How many triangles can be seen?

Correct the following statement:
In a scalene triangle, angles opposite to equal sides are equal.