If it's a right triangle, then one.There is no other way to have a perpendicular angle in a triangle without it being 90 degrees, or right.
The 2 perpendicular sides of a right angle triangle intersect each other at right angles
A right angled triangle.
They meet at right angles
Perpendicular lines intersect at right angles.
A triangle with a right angle in it is the only case in which a triangle can have perpendicular lines. Triangles themselves cannot be perpendictular unless you are referring to one of the sides being perpendicular to a certain line.
The 2 perpendicular sides of a right angle triangle intersect each other at right angles
It has a pair of perpendicular lines that meet at right angles to form the 90 degree angle of a right angle triangle.
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.
Perpendicular means meeting at a right angle. A right triangle has 2 sides that are perpendicular, so it has 1 pair of sides that are perpendicular They are known as the "legs" of the right triangle.
a right triangle
Perpendicular.
A triangle has no parallel sides but in the form of a right angle triangle it has perpendicular lines that meet at right angles which is 90 degrees.
There are twp perpendicular edges in a triangular prism. See if you draw a triangle you'll have two angles or edges that are the same length. That is if you draw a standard triangle.
If you have a triangle then one of the sides cannot be perpendicular to the other two. It is true for a square but it is impossible with a triangle. Definition of perpendicular: Being at right angles to the horizontal; vertical.
They meet at right angles
A right angled triangle.
There are 3 angles in a triangle