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Geometry - 1.1 & 1.2 Review
Terms in this set (13)
Define a point.
location with no size and is undefined
length of a line segment that connects two points
If AB + BC = AC, what does this tell you about the three points?
they are on the same line
What is an axiom?
a statement that is accepted as being true without any proof
Through any two points...
only one straight line can be drawn.
Define line segment.
part of a line that consists of 2 end points and all of the points inbetween
- ex: AB with — on top (also can be written without)
points that lie on the same line
Define a line.
straight path that extends in two opposite directions forever and is undefined
- ex: AB with <-> on top
Define a ray.
part of a line that consists of one end point and all of the points on the line are on one side of that endpoint
- one side goes on forever while the other has an endpoint
- ex: AB with -> on top
Define an angle.
formed by two rays with the same endpoint
- the rays are the sides and the endpoint is the vertex (or turning point)
- ex: m∠ABC
What does the "m" mean in m∠?
the measure of...
- means answer is a number
What do you have to be mindful of when labeling multiple angles with just one letter?
do not use one letter to name an angle if its vertex is shared with other angles!
What do you have to be mindful of when using a protractor to measure an angle?
obtuse angle = numbers above 90
acute angle = numbers below 90
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