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29 Cards in this Set
 Front
 Back
segment

two points on a line and all the points between them


points

the simplist figure in geometry. representing an exact location


angle

a figure formed by two roys with the same endpoint


acute angle

angle with measurements less than 90 degrees


endpoint

the point at the end of the ray or line segment


the ends oa a diameter dicide the circle into two ___________.

semicircles


chord

a segment joining two points on the circle


circle

the set of all points in a plane at a given distance from a given point O called the center


How do you name an angle?

by giving its vertex angle or
by listing letters for points on the two sides with the vertex letter in the middle 

parallel lines

lines 1) in the same plane 2) that do not intersect


non collinear

points not on the same line


complimentary

angles whose measures have a sum of 90 degrees


collinear

two or more points on the same line


congruent figures

figures that have the same size and shape


sides

the fays making up an angle


radius

a segment joining the center of a circle to a point on the circle


parallel planes

planes that do not intersect


a square cm is a square which is _____________ wide and _____________ long

one cm
one cm 

right angle

a 90 degree angle
(the angle formed by perpendicular lines) 

supplementary angles

two angles whos measures have a fum of 90 degrees


ray

a part of the line with the endpoint


plane

a flat surface extending in all directions


perpendicular lines

two angles that intersect to form a 90 degrees


line

1) a figure determined by 2 points
2) extending in both directions 

a chord passing through the center is called the __________ of the circle

diameter


skew lines

lines that are not parallel and do not intersect


midpoint

the point on a line segment that divides it into two segments of equal length


vertex

the common endpointof an angle


obtuse angle

angle with measurements greater than 90 degrees
