A part of a line that starts at one endpoint and extends forever.
A triangle containing one obtuse angle.
An angle that measures less than 90 degrees.
A triangle with all angles measuring less than 90 degrees.
Having the same size and shape.
A flat surface that extends forever.
A part of a line between two endpoints.
A straight path that extends without end in opposite directions.
A triangle containing a right triangle.
Two angles whose measures have a sum of 180 degrees
Two angles whose measures add to 90 degrees.
An exact location in space.
An angle whose measures is greater than 90 degrees but less than 180 degrees.
A line that is formed by two rays and with a common endpoint called the vertexe
A angle that measures 90 degree.
A angle whos measures are greater than 90 degrees.
A line that intersects any two or more other lines.
Tow lines in a plane that never meet.
Lines that intersect at 90 degree angles.