A triangle with a 90 degree angle.
It means that it is a right angle triangle
If you mean angles then it is a right angle triangle or an isosceles right angle triangle
If you mean what type of triangle has perpendicular lines then it is right angle triangle.
It does not mean anything in particular.
A triangle with a 90 degree angle.
It means that it is a right angle triangle
If you mean angles then it is a right angle triangle or an isosceles right angle triangle
I am guessing you mean a right angled triangle. The hypotenuse is the longest side on a right angled triangle. So it is the side facing / parallel to the right angle.
If you mean can a triangle have 3 equal sides and the answer is yes it can and it is called an equilateral triangle.
If you mean what type of triangle has perpendicular lines then it is right angle triangle.
the longest side of a right triangle
It does not mean anything in particular.
If you mean dimensions of 11, 60 and 61 then yes they will form a right angle triangle.
The hypotenuse is the long side of a right triangle.
If you mean dimensions of 3 by 4 by 6 then it can't be a right angle triangle because they don't comply with Pythagoras' theorem.
An isosceles triangle is a triangle that has two sides of equal length. A right triangle has an interior angle of 90 degrees. A right isosceles triangle has both characteristics. The 90 degree angle will be the angle formed by the sides of equal length.