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'Isocoles' and 'Equalateral' triangles are, scalene, right angled, and obtuse triangles are not.
1 triangle = 3 angles so 4 triangles = 4 x 3 = 12 angles unless some triangles are within others
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No. Spherical geometry did not disprove Euclidean geometry but demonstrated that more than one geometries were possible. Different circumstances required different geometries. Similarly hyperbolic geometry did not disprove either of the others.
It can be but it doesn't have to be. Some triangles are symmetrical and others aren't.
which pairs of triangles appear to be congruent
Some triangles are symmetric, while others are not. All equilateral and isosceles triangles are symmetric.all triangles are symmetric.
'Isocoles' and 'Equalateral' triangles are, scalene, right angled, and obtuse triangles are not.
Right triangles do. Others don't.
1 triangle = 3 angles so 4 triangles = 4 x 3 = 12 angles unless some triangles are within others
Yes it does * * * * * No, it does not
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No. Spherical geometry did not disprove Euclidean geometry but demonstrated that more than one geometries were possible. Different circumstances required different geometries. Similarly hyperbolic geometry did not disprove either of the others.
Table algebra is the branch of mathematics like geometry and others.
Not necessarily. Right triangles do. Others don't.
It can be but it doesn't have to be. Some triangles are symmetrical and others aren't.
An octagonal pyramid has eight triangles on an octagonal base. An octahedron can also be made by putting a square pyramid on another inverted square pyramid. This shape has just eight triangles and no others.