English Word: 2-Angle Triangle in a Sphere

[prinsinn]

Triangle has three angles but what do you call it when it has just two angles like in a sphere.

 

[mgb_phys]

Only a triangle on a sphere with 2 right angles and a 180 degree internal angle would have just 2 angles. It would thne be a quarter sphere - but I don't think it has any special name.

 

[prinsinn]

I try that