I do not know about angels but a triangle must have exactly three angles.
there should be 3 angles in a normal triangle......
There are 3 angles in a triangle that add up to 180 degrees.
kinds of triangle as to angels
A triangle has 3 interior angles that add up to 180 degrees.
All triangles have three angles.
An isosceles triangle is a triangle that has two equal sides. The two angels opposite the equal sides are equal angels.
It is an equilateral triangle