Question

which triangle have three right angle​

Answer 1

Answer:

Step-by-step explanation:

spherical triangle

A spherical triangle can have three angles of size pi/2 or a right angle. In this case, the sides of the spherical triangle are right angles as well.

Answer 2

Answer:

You have a triangle with 3 right angles. Of course, it is not a triangle in the Euclidean plane. Any triangle in the Euclidean plane has the property that if you add up the three angles, the sum will be , which means you cannot have 3 right angles