Vocabulary
A series of points that goes infinitely in one direction
What is a ray?
Two rays that share a common endpoint
What is an angle?
An angle that measures more than 90 but less than 180 degrees
What is an obtuse angle?
A 3-sided shape with a sum of 180 degrees
What is a triangle?
Two lines (or line segments) that form right angles at their intersection
What is perpendicular
A portion of a line with two endpoints
What is a line segment?
The shared endpoint of an angle's rays
What is the vertex?
An angle that is less than 90 degrees.
What is an acute angle?
A triangle with a 90 degree angle
What is a right?
Lines or line segments that do not cross
What is parallel?
A series of points that goes infinitely in both directions
What is a line?
Angles that are formed by intersecting lines (that look like an X)
What are vertical angles?
An angle that measures exactly 90 degrees
What is a right angle?
A triangle with 2 equal sides and angles
What is isosceles?
The point on a line segment that splits it into two congruent parts
What is midpoint?
A line, segment, or ray that cuts an angle or another segment in half
What is a bisector?
Two angles who sum of measures is 90 degrees.
What are complementary angles?
Two angles that add to 180 degrees
What are supplementary angles?
A triangle with all equal sides and angles
What is equilateral?
This means "of equal measure"
What is congruent?
A flat 2D surface that extends indefinitely in a directions
What is a plane?
The complement of an angle that measures 30 degrees
What is 60 degrees?
An angle that is the supplement of an angle that measures 100 degrees
What is 80 degrees?
A triangle with no equal sides or angles
What is scalene?
A segment that goes through the center that has endpoints on both sides of the circle
What is the diameter?