point
a location in space represented by a dot
line AB
ray AB
line segment AB
parallel lines
two lines that do not intersect
perpendicular lines
two lines that intersect to form a right angle
angle
two different rays that have the same initial point
acute angle
an angle that measures between 0-90 degrees
right angle
an angle that measures exactly 90 degrees
obtuse angle
an angle that measures between 90 and 180 degrees
equilateral triangle
a triangle that has three congruent sides
isosceles triangle
a triangle that has two congruent sides
scalene triangle
a triangle that has no congruent sides
Angle bisector
A ray that cuts an angle exactly in half
congruent segments
Segments that have the same length
Perpendicular bisector
A line that crosses the midpoint of a segment at a right angle
vertex of an angle
The common endpoint of the two rays that form an angle