a triangle with two equal sides
The common endpoint of an angle
a triangle with one obtuse angle
a triangle with one right angle
a triangle with no two sides of equal length
a triangle with three equal sides
an angle that measures 180 degrees
An angle more than 90 degrees
an angle that measures 90 degrees
two rays with a common endpoint
An angle less than 90 degrees
An endless flat surface
part of a line with two endpoints
An exact location in space
lines that cross at one point
Part of a line that has one endpoint and extends forever in one direction.
A straight path of points that goes on forever in two directions
Two lines that intersect to form right angles
Lines in the same plane that do not intersect
Lines that do not intersect, are not parallel, and are not in the same plane
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