Right Angled triangle Isoceles triangle Equalateral Acute scalene triangle Obtuse scalene triangle equalatrial isosilies scaline
No. All triangles MUST have at least two acute angles.
No, but all equilateral triangles are acute. Acute: All angles of the triangle are less than 90 degrees. Equilateral: All angles of the triangle are 60 degrees.
Yes.
All equilateral triangles are acute triangles, since all the angles are less than 90 degrees.
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
Yes all equilateral triangles are acute triangles, but not all acute triangle are equilateral triangles.
Right Angled triangle Isoceles triangle Equalateral Acute scalene triangle Obtuse scalene triangle equalatrial isosilies scaline
Yes all equilateral triangles are acute triangles, but not all acute triangle are equilateral triangles.
Tetrahedron
No. All triangles MUST have at least two acute angles.
Yes. All equilateral triangles have three equal sides (or angles) so two of them MUST be equal.
No, but all equilateral triangles are acute. Acute: All angles of the triangle are less than 90 degrees. Equilateral: All angles of the triangle are 60 degrees.
Yes.
All triangles have at least two acute angles. Acute triangles have three. Rhomboids also have two acute angles.
All equilateral triangles are acute triangles, since all the angles are less than 90 degrees.
An acute triangle has all three angles less than 90 degrees.