1.
Angle whose measure is less than 90 degrees
2.
Formed by the intersection of lines or segments
3.
Divides a segment or angle into two pieces of equal measure
4.
Formed by two Greek words that mean "Earth" and "Measure"
5.
Point where lines or segments cross or the line where planes cross
6.
One-dimensional object that is a straight arrangement of points that extends forever in opposite directions
7.
Lines or planes that never touch and remain a fixed distance apart everywhere
8.
Intersect to form a right angle
9.
Two-dimensional object that resembles an infinite flat surface
10.
0-dimensional object at a location in space
11.
Angle whose measure is greater than 90 degrees but less than 180 degrees
12.
Part of a line that begins at a point then extends forever in one direction
13.
An Angle whose measure is exactly 90 degrees
14.
Part of a line that begins and ends at a point, and thus has a finite measurable length
15.
Lines or segments that do not intersect but also are not extending in the same directions
16.
An Angle whose measure is exactly 180 degrees
