Angles Flashcards
What is plane geometry about?
It is about lines and flat shapes like angles, circles and triangle, that can be drawn on a piece of paper.
what is a point?
Has no dimensions, only one position.
what is a line?
It has 1 dimension
What is length
It is measured from one point to another
What is an angle?
2 lines joined at a point with “turning” space between them.
What are parrallel lines?
2 or more lines that are exactly the same distance apart are called parallel lines. They do not have to be the same length and can be in any direction.
What are perpendicular lines?
They are lines that are right angle to each other.
What is an acute angle?
An angle that measures less than 90 degrees
What is a right angle?
They measure exactly 90 degrees
What is an obtuse angle?
They measure between 90 degrees and 180 degrees
What is a straight angle?
They measure exactly 180 degrees.
What is a reflex angle?
They measure between 180 degrees and 360 degrees.
What is a revolution?
They measure exactly 360 degrees
What are the 4 parts of an angle?
- Vertex
- arms
- angle
What are the arms of an angle?
The straight lines
