Can a triangle have one right angle?

Answer 1

Yes, a triangle can have one right angle. This type of triangle is called a right triangle, where one of the angles measures exactly 90 degrees. The other two angles in a right triangle must add up to 90 degrees as well, making it a total of 180 degrees for all three angles in the triangle. Right triangles have many interesting properties and are commonly used in geometry and trigonometry.

Answer 2

The internal angles of a triangle always total 180 degrees

The 180 degrees must be shared between the three corners (verticies)

A right angle is 90 degrees so yes you can have one right angle in a triangle, but you do not have to have one.

Take away the 90 degrees you have already used in the right angle

180 - 90 = 90

the remaining 90 degree must be shared between the other two corners, so you cannot have more than one right angle in a triangle.