Vocabulary
A tool that helps measure angles is called?
a Protractor
How many endpoints does a line have?
Zero. A line stretches on and on in both directions with no endpoints
Name the line below:
H º----------------º G
__
HG
True or False:
A perpendicular line intersects at a 90o angle
True
What is a mathematician’s favorite type of tree?
A Geometree
In what unit are angles measured?
How many end points does a line segment have?
Two
Example:
A.__________________.B
What symbol do we use to show a set of parallel lines?
a) ʟ
b) ||
c) ǂ
b) ||
Ex: BC || XY
True or False:
Parallel lines are two lines that will intersect eventually if you extend them.
False.
Parallel lines will NEVER intersect, no matter how long you extend them
Why should a triangle never get into an argument with a circle?
Because it's pointless!
Two lines that cross at the same point are called?
Intersecting lines
An exact location in space is called..
What symbol do we use to show that an angle is 90º?
A small square the at vertex.
True or False:
Any angle less than 90o is called an acute angle
True!
Why was the obtuse triangle so upset?
Because he's never right!
Lines that are equal distance apart and never intersect are called?
Parallel lines
How many endpoints does a ray have?
One
What symbol do we use to show that two lines are perpendicular?
a) o
b) ||
c) ┴
c) ┴
ex: AB ┴ HG
True or False
An obtuse angle is any angle that measures more than 45o
False
What happened when the mathematician forgot to close their parrot’s cage before they left the house?
Polygon!
Two lines that cross and form a right angle are called?
Perpendicular lines
How many endpoints does an angle have?
What symbol do we use to show a triangle?
a) ∆
b) T
c) o
a) ∆
Ex: ∆LMN
True or False:
You can check that lines are parallel by creating a perpendicular line that intersects both lines.
True. If the intersecting line is perpendicular to both lines, it means they are parallel
What happened to the mathematician who was caught robbing banks?
A judge sent him to prism!