Vocab 1
Segment
Part of a line that links two points
Coplanar
Points that lie in the same plane
Angles <A and <B are complementary. If <A = 32 What is <B
58 degrees
What is the difference between skew lines and parallel lines?
Parallel lines lie on the same plane
Skew lines are non-coplanar
A plane is made up of at least 2 points
False, at least 3
Ray
Part of a line that starts at one point and goes in one direction forever
Vertical Angles
Angles opposite from one another formed when two lines intersect. They are congruent.
<ABC = 4x+4
Line DB bisects <ABC. If <ABD= 12
What is x?
x = 5
A, B, And C are Collinear
AB = x+1
BC = 2x+3
AC = 4x - 5
What is length of X?
x=9
A line is made up of at least 2 points
True
Angle
A shape made up of two rays diverging from a common point (Vertex)
Complementary Angles
two angles that add up to 90 degrees
<A and <B form a linear Pair
If <A = 3x-9 and <B=2x+4 What is <A?
<A = 102 degrees
A, B, And C are Collinear
AB = 5(x+1)
BC = x-23
AC = x-10
What is the value of X?
x = 8/5
IF <ABC is 90 degrees than A, B, and C are Collinear.
False. They would not be in a straight line
Perpendicular Lines
Lines that intersect to form 90 degree angles
Supplementary Angles
Two angles that add up to 180 degrees
<a and <b are vertical angles.
<a= 108
<b = 5x+8
What is the value of x?
x = 20
A, B, and C are collinear and B is the Midpoint of line AC.
If line AB = 2x+4 and AC=28 What is the value of x?
x = 5
IF <ABC is 90 degrees than A, B, and C are Coplanar.
True
Skew Lines
Two NON-COPLANAR lines that do not intersect
the difference between Adjacent Angles, and a Linear Pair
Ray BD splits <ABC into two Angles such that
<ABD = 3x+3
<CBD = 6x+5
<ABC = 11x -10
What is Angle <CBD?
<CBD = 59
If B is the midpoint of Line AC with
A: (2, -4) and C:(10, 4)
Find the coordinates of point B.
B ( 6 , 0 )
Supplementary angles and a Linear Pair are the same thing.
False, Linear Pair must be adjacent, supplementary don't have to touch.