Measure it and if it is 90 degrees, then it is a right angle
if it has a right angle
If it has a 90 degree angle and two acute angles then it is a right angle triangle.
90 degree angle
No way to tell as we don't know an angle or another side.
It tells you if the angle is acute, right, obtuse or reflex.
if it has a right angle
If it has a 90 degree angle and two acute angles then it is a right angle triangle.
A right angle is an internal angle equal to 90o You can tell if an angle is a right angle because it has a little symbol which is a square where the two lines meet to form the angle. A right angle is a quarter of a circle. Lines that are at a right angle are perpendicular to each other.
90 degree angle
If it has an obtuse angle
No way to tell as we don't know an angle or another side.
a right angle is a right angle
If the tree sides of the triangles form a Pythagoras triplet then we can say that the angle opposite to the greatest side is a right angle.
Because a right angle is a right angle.
It tells you if the angle is acute, right, obtuse or reflex.
A right angle is an angle of 90 degrees.
Assuming your question is what makes a right-angle, it is an angle of 90o .