Vocabulary 1
A straight continuous arrangement of an infinite number of points. Has an infinite length, but no width.
Line
Described as a location in space, has no size or shape, often represented by using a dot.
Point
Is a tool used to create arcs and circles
Compass
Is a ruler with no numbers
Straightedge
Is a freehand drawing of an object
Sketch
To have the same size, shape, and measure
Congruent
The curve between two points on a circle
Arc
The points where the line segment ends
Endpoints
Is a portion of a line that includes two points and all the points between those points
Line Segment
A flat surface that has infinite length and width, but no depth
Plane
The sum of angle measures is equal to 180 degrees
Supplementary Angles
Formed when the sides of the angle point in exactly opposite direction
Straight Angle
The common endpoint that two rays share
Vertex
Part of a line that begins at a point and extends infinitely in one direction
Ray
Formed by two rays that share a common endpoint
Angle
When points lie on the same line or line segment
Collinear
Two angles that share a common vertex and share a common side
Adjacent Angles
Formed by two adjacent angles that have noncommon sides that form a line
Linear Pair
If two lines, line segments, or rays intersect to form 90 degree angles
Perpendicular
The sum of angle measure is equal to 90 degrees
Complementary Angles
The angle whose sides are made up of the given sides of a triangle
Included Angles
The side between two given angles of a triangle
Included Side
A trapezoid that has congruent non-parallel sides
Isosceles Trapezoid
States that the sum of the lengths of any two sides of a triangle is greater than the length of the third side
Triangle Inequality Theorem
Two nonadjacent angles that are formed by two intersecting lines
Vertical Angles