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Geometry Vocab Quiz

Flashcards for the basic geometry vocabulary

QuestionAnswer
What is a postulate? A statement of fact
What is another name for a postulate? An axiom
What is collinear? Points that lie on the same line
How many points do there need to be to be collinear? Three or more
What is non-collinear? Points that do not lie on the same line
How many points do there need to be to be non-collinear? Three or more
What is coplanar? Three or more points/ lines that lie on the same plane
What is non-coplanar? Three or more points/ lines that do not lie on the same plane
What are the three undefined terms? Point, line, and plane
What is a ray? Part of a line that consists of one end point and all the points of the line on one side of the endpoint
What are opposite rays? Two rays that share the same end point and form a straight line
What is a segment? Part of a line that consists of two end points and all points between them
What is the ruler postulate? The distance between any two points is the absolute value of the difference of the corresponding numbers
What is the segment addition postulate? If three points A, B, and C are collinear and B is between A and C, then AB + BC = AC
What is a midpoint? A point that divides a segment into two congruent segments; bisects a segment; cuts in half
What are congruent segments? Same size, similar shape, equal measures, mark with a tick mark to show congruence
What is an acute angle? Angles between 0 and 90 degrees
What is an obtuse angle? Angles between 90 and 180 degrees
What is a right angle? Angles that are 90 degrees
What is a straight angle? Angles that are 180 degrees, or a straight line
What are adjacent angles? Two angles that are side by side and share a side and vertex
What are vertical angles? Two angles that are always congruent because their sides form two pairs of opposite rays
What is a linear pair? A pair of adjacent angles forming a straight line
What does it mean to be complimentary? The two angles add up to 90 degrees
What does it mean to be supplementary? The two angles add up to be 180 degrees
What is the theorem? All right angles are congruent and two angles that are supplementary and congruent are both right angles
Created by: alexprice