Unit 1 Flashcards
How do you name a point?
With a single capital letter
How do you define a plane?
By 3 noncollinear points
What are the ways to name a plane?
With 3 noncollinear points or a script capital letter
Two or more points that lie in the same line are called what?
Collinear
Three or more points that lie in the same plane are called what?
Coplanar
If you draw 3 points that are noncollinear, how many planes go through those points?
One
If you draw 2 points, how many planes pass through them?
Infinite
What is formed by the intersection of 2 planes?
A line
What is formed by the intersection of 2 lines?
A point
How do you name a line?
- With any 2 points and the symbol for line above it
- With a lowercase letter (no symbol)
How do you name a line segment?
Line Segment: With the 2 endpoints and the line symbol above it
How do you name a ray?
Ray: With the endpoint first, followed by another point on the ray, with the ray symbol above it
What do opposite rays look like?
A line
If you draw 2 opposite rays, what do they have in common?
The endpoint
What are 2 congruent segments?
2 segments with the same length
On a number line what is the coordinate, the number or the letter?
The number
How do you find the length of a segment on a number line?
The absolute value of the difference of the coordinates
What does midpoint mean?
Point in the middle of a line segment creating 2 congruent segments
What is the midpoint formula on a number line?
M = (A+B)/2