Undefined Terms
As an indicator of location, this undefined term is left with no dimension.
When broken down etymologically, the word "Geometry" translates to this two word phrase to describe the math study as an assessment of the world we live in.
"Earth's measures"
Most people have heard that parallel lines will never intersect, but these lines must also live on the same flat surface, otherwise known by this geometric term.
coplanar
Unlike parallel lines, perpendicular lines intersect and specifically form four equal angles, each measuring this many degrees.
90
This type of transformation produces an image that is congruent to its pre-image.
Rigid Motion, Congruence Transformation
This term is used to describe a collection of items usually called "members".
Set
If a point is the midpoint, then it does this to a line segment.
Divides the segment into two, congruent parts
Equal/Same
The symbol for "is perpendicular to" looks like this letter, but upside down.
The letter T
This transformation is not a rigid motion even though it produces an image whose corresponding angles are congruent.
Dilation
The midpoint between (0,6) and (0,4),
(0,5)
A line that crosses two lines at two distinct points is called this (whether there's parallel lines or not).
Transversal
The slopes of perpendicular lines are....
negative reciprocals
This popular composition of transformations is named after its dancelike moves across the coordinate plane as it combines a line reflection and a translation parallel to the line of reflection.
A set of infinite lines forming a flat surface
Plane
(-2, -1)
When lines are parallel, these angles are congruent and can be found in the corners of a letter Z that can be formed within the diagram.
Alternate Interior Angles
The slopes of perpendicular lines have a product of -1 except when it's these two types of lines. One of which has a slope of 0 while the other doesn't even have one.
horizontal and vertical lines
This congruence transformation spins objects about a center, by a specific amount of degrees.
Rotation
This is the name of ancient mathematician Euclid of Alexandria's famous book of the building blocks of Geometry.
Elements
The length of the line segment connecting (9,2) and (1,8) to the nearest tenth unit on the coordinate plane. 10.0
10.0
Euclid described parallel lines a bit differently from how we learn it. The ancient mathematician utilized the formation(or lack there) of this basic shape between two lines and a transversal to define parallelism.
Triangle
The slope of a line perpendicular to y=4x-1
-1/4
(6,-4)