triangle types and definitions
Types of Triangles. Right triangle: Has one 90 degree angle. Equilateral triangle: All angles are the same (60 degrees) Isosceles triangle: Has two angles the same and two sides the same. Scalene triangle: Has all three angles and all three sides different. Obtuse triangle: Has one obtuse angle, greater than 90 degrees. The sum of all angles in a triangle is ___________ degrees.