English Word: 2-Angle Triangle in a Sphere

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SUMMARY

A triangle on a sphere can exhibit two angles when it consists of two right angles and a 180-degree internal angle, forming a quarter sphere. This geometric configuration does not have a widely recognized specific name. The discussion highlights the unique properties of spherical geometry, particularly how traditional definitions of triangles do not apply in the same way as in Euclidean geometry.

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  • Basic concepts of geometric shapes
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Triangle has three angles but what do you call it when it has just two angles like in a sphere.
 
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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.
 
I try that
 

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