three line segments that intersect only at their end points
Triangle
part of a line containing two end points
Line Segment
the point where the two or more line segments intersect
Vertex
sides that have the same length & angles that have the same measurement
Congruent
all angles are acute
Acute
one angle is obtuse
Obtuse
one angle is 90*
Right
no sides are the same length
Scalene
two sides are the same length
Isosceles
all sides are the same length
Equilateral