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Triangle with all angles less than ninety?
In plane geometry, all triangles have the sum of the angles to be 180 degrees. So There are many triangles with all the angles less than 90. ( if one angle is more than 90 degrees, then its called 'obtuse' , if all the angles are less than 90, then its called 'Acute' ). Two types of triangles with angles less than 90 degrees are Equalaterial and Isocoles. ( Equalaterial have two equal angles, Isocoles have three equal angles, all 60 degress ). You can think in terms of sets: The subset of Triangles is Acute, The subset of Acute Triangles is Equalateral, The subset of Equalateral Triangles is Isocoles. {Triangles{Obtuse|Acute{Equlaterial{Isocoles
Can a scalene triangle be a triangle?
Yes, a scalene triangle can be a triangle.
What is a nested triangle?
a triangle in a triangle
How is a triangle the same as a equilateral triangle?
A triangle is the same as a equilateral triangle because a equilateral triangle is a triangle but it is congruent on all sides
Different kinds of triangle?
there is equilateral triangle, right triangle, isosceles triangle, obtuse triangle, acute triangle, scalene triangle and oblique triangle
