Terms
segments with the same length
congruent segments
two angles whose measures have a sum of 90
complementary angles
Point B is between points A and C. AB=60 AC= 40 what is the measure of segment BC?
20
any angle less than 90 degrees
acute angles
point in direct center of two points
midpoint
two angles whose measures have a sum of 180
supplementary angles
how many points are on a line
infinitely
any angle that is 90 degrees
right angles
any segment, line, or plane that intersects a segment at its midpoint
segment bisector
two lines that intersect to form right angles
perpendicular lines
opposite rays create what
a line
any angle over 90 degrees
obtuse angles
angles with the same measure
congruent angles
an angle with a measure of 90, also is found in a set of perpendicular lines
right angle
true or false: 2 points are always collinear and/or coplaner
true
angles across from each other that only contain the same vertex
vertical angles
any line, ray, or plane that divides an angles into two congruent angles
angle bisector
"vertical angles are congruent"
"the sum of the measure of the angles in a linear pair is 180"
theorems
a line
adjacent angles