Basic Geometric Terms

a flat surface that extends endlessly in all directions.

• vertex

• plane

• angle

• line

having the same endpoint but opposite directions. 

• coplanar

• line segment

• opposite rays intersection

• side

a part of a line having two endpoints.

• line segment

• vertex

• point

• acute

 a line segment that joins two verticals in a shape. 

• right

• compass

• sides

• straight edge

 an exact location in space.  A point has no dimension. 

• ray

• point

• obtuse

• collinear points plane

points on the same plane.

• acute

• right

• angle bisector

• coplanar

consists of two rays that have a common endpoint called the vertex of the angle.

• line

• ray

• angle

• linear pair

 is an angle whose measure is 180. 

• ray

• straight angle

• compass

• midpoint

 set of processes for constructing geometric shapes.

• midpoint

• congruent

• geometric construction

• right

 a collection of points along a straight path that extends endlessly in both directions. 

• distance

• line

• complementary angles

• linear pair