A triangle is the simplest polygon, having three sides and three angles. The sum of the three angles of a triangle is equal to 180 degrees.

Types Of Triangles
&
Their ProperTies...

Triangles are classified by sides and by angles...

Classified by:

Number of equal sides:

  Isosceles: Two equal sides, side a=side b

Scalene: No equal sides

Equilateral triangle: Three equal sides, side a=b=c

Types of Angles              

Acute: Three acute angles

Obtuse: One obtuse angle