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Acute Angle
Angles that measure less than 90 degrees
Area
the number of square units enclosed by a figure
Vertical Angles
two angles whose sides form two pairs of opposite rays
Intersection
a place or area where two or more things intersect
Midpoint
the point that divides the segment into two congruent segments
Perpendicular Lines
lines that intersect and form right angles
line
a line is endless in both directions
Obtuse Angles
an angle whos measure is more than 90 degress but less than 180 degress
Plane
a flat surface
right angle
an angle whose measure is 90 degress
theorem
a statement that has been proved based on facts
Angle
formed by two rays with the same endpoint
between
something in the middle of two objects
Congruent
identical in form
Complementary angles
when the sum of two angles is equal to 90 degress
Linear Pair
two adjacent angles that sum to 180 degrees. they share a common vertex and a common arm
Opposite Rays
two rays that have the same endpoint and extend in opposite directions
Point
a location in any space
segment bisector
a line, line segment, ray, or point that cuts a line segment exactly in half
angle bisector
a line that splits an angle into two equal angles
collinear
3 or more poinys lying on the same straight line
constructions
accurate drawings of shapes, angles and lines in geometry
line segment
a line bounded by two endpoints on both sides
ray
bound by a endpoint on one side and goes on in the other direction forever
vertex
an angular point where two or more lines meet
supplementary angles
either of two angles whose sum is 180 degrees
concurrent lines
Three or more lines in a plane meet each other at one common point
Postulate
an accepted statement or fact
adjacent angles
two angles that share the same vertex and side
base
the surface
distance from a point on a line
the length of the perpendicular segment from the point on the line
distance between two points on a line
the absolute value of the difference of the coordinates of the points