TRIANGLES

• The sum of all angles of any triangle is 180°
• Equilateral has same lengths in all sides
• Isosceles triangle has 2 equal sides and 2 equal angles
• Scalene triangle has no equal sides or angles
• Acute triangle has only acute angles
• Obtuse triangle has an obtuse angle
• Right triangle contains a right angle
• 30-60-90 triangle

  
• 45-45-90 triangle

  
• Pythagorean triples

  
• 3-4-5 triangle