triangle -Nicholas

1.   A triangle is a closed figure with three sides.

2. There are six types of triangles.
A. Equilateral triangle
it has all three sides that are equal length, and consequently all three interior angles are equal size also.

B. isosceles triangle
it has two sides that are the same length and the other side a diffrent length.

C. Scalene triangle
it is one that has no sides that are of equal length.

D. right triangle
it has exactly one angle that is 90 degree.

E. obtuse triangle
it is a triangle where one (and only one) angle is an obtuse angle (its greater than 90 degree)

F. acute triangle
it is a triangle where all of the angles are acute angels.