A right triangle in a plane is one in which one of the three angles is a right angle. It is obious that the two sides, making up the right angle, must be perpendicular. In symbols, if triangle ABC is a right triangle with angle B as the right angle, then the sides AB and BC are perpendicular.
Chat with our AI personalities
If it is a 45° 45° 90° isosceles right triangle, then there are 2 sides that are perpendicular.
A triangle has no parallel sides but a right angle triangle has perpendicular sides that meet at 90 degrees.
A right angled triangle is an example of a shape with exactly 2 perpendicular sides.
An obtuse triangle is a triangle with one angle greater than 90 degrees. Since a perpendicular side is a side that forms a right angle with another side, an obtuse triangle can have 0 perpendicular sides if all its angles are obtuse. However, it can also have 1 perpendicular side if one of its angles is a right angle.
a triangle with 2 sides