Lines
What is one way we can name a line?
Two points on the line or the lowercase script letter name of the line
How is a plane named?
Three non-collinear points or the uppercase script letter.
What does the distance formula allow us to calculate?
The distance between two endpoints.
5x+8=33
5
What does congruent mean?
Same as or equal
What defines the intersection of two lines?
A point
What is a ray?
A part of a line with one endpoint that extends infinitely in one direction.
What does bisect mean?
To divide into two equal parts.
If AB = 5, BC = 8, and B is between A and C, find AC.
What are perpendicular lines?
Lines that intersect to form a right angle.
What are parallel lines?
Lines that never intersect.
What is a plane?
A flat surface that extends infinitely in all directions.
What is the midpoint formula?
m = ((x₁ + x₂) / 2, (y₁ + y₂) / 2).
If AB = x + 3, BC = 2x - 5, and AC = 19, find x.
x=7
What is a point?
A location.
--->
Segments with the same length are said to be what?
Congruent.
What is the distance formula?
d = √((x₂ - x₁)² + (y₂ - y₁)²)
Find the midpoint of the line segment with endpoints (-4, 5) and (2, -1).
(-1,2)
Points that lie on the same line are called what?
Collinear points.
If lines l and m intersect at point A, then we know that point A is on one line, both lines, or neither lines?
What is the segment addition postulate?
AB + BC = AC
Find the midpoint of the line segment with endpoints (2, 3) and (8, 11).
(5,7)
If AC = 15, BC = 9, and B is between A and C, find AB.
6
Points that lie on the same plane are called what?
Coplanar points.