an exact location in space
an endless collection of points along a straight path
part of a line that has two endpoints
part of a line that has one endpoint and extends endlessly in the other direction
an endless, flat surface that is named by any three points not on the same line
two rays that have the same endpoint
the endpoint of a ray
an angle that measures exactly 90 degrees
an angle that measures exactly 180 degrees
an angle that is less than 90 degrees
an angle that is more than 90 degrees and less than 180 degrees
what we measure angles in
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