1	acute angle		_____	two angles that sum to 90º
2	adjacent angles		_____	a closed figure made up of segments
3	bisector		_____	the endpoint of 2 rays that form an angle
4	circumference		_____	an angle that measures 180º exactly
5	collinear points		_____	points or lines that lie on the same plane
6	complementary angles		_____	a 2 dimensional figure that is straight & continuous in 2 directions
7	congruent		_____	a pair of adjacent angles that form a line
8	conjecture		_____	a line that cuts a segment or angle into two equal pieces
9	coplanar		_____	a piece of a line that has 2 endpoints
10	intersection		_____	a piece of a line that is continuous in one direction
11	line		_____	an angle that measures more than 90º but less than 180º
12	linear pair		_____	an educated guess based on patterns or examples
13	midpoint		_____	the figure that represents location
14	obtuse		_____	a point (or line) where 2 or more lines (planes) meet
15	opposite rays		_____	points on the same line
16	plane		_____	the distance around a polygon
17	ray		_____	angles or segments that have the same measurement
18	right		_____	an angle that measures less than 90º
19	segment		_____	two angles that sum to 180º
20	straight		_____	angles that are next door neighbors
21	supplementary		_____	two collinear rays that share a common endpoint and travel in opposite directions
22	vertical		_____	a 2-dimensional diagram that you can fold to form a 3-d figure
23	point		_____	a point that divides a segment into two equal segments
24	coordinate		_____	two angles that are not adjacent, always congruent, and formed by two intersecting lines
25	perimeter		_____	an angle that measures 90º exactly
26	net		_____	distance around a circle
27	polygon		_____	numbers that correspond to a point on a number line or graph
28	vertex		_____	a flat surface that is continuous in each direction