Classification and properties of the triangles

Consider a few triangles with the following characteristics, categorize them according to their number of sides and of angles:

  1. Triangle with three interior angles of less than $90^\circ$ and with three equal sides.
  2. Triangle with an interior angle higher than $90^\circ$ and two equal sides.
  3. Triangle with an angle of $90^\circ$ and three different sides.
  4. Triangle with an angle of $90^\circ$ and two equal sides.
  5. Triangle with two equal sides which form an angle of less than $90^\circ$.
  6. Triangle with an interior angle higher than $90^\circ$ and two equal sides.

Theoretical exercise.

  1. Acute angled equilateral.
  2. Obtuse angled isosceles.
  3. Rectangular scalene.
  4. Rectangular Isosceles.
  5. Acute angled isosceles.
  6. Obtuse angled isosceles.
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