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Math Vocab Chapter 8

Terms in this set (22)

Right angle
An angle which measures exactly 90 degrees
Adjacent Angles
Two angles which share a common vertex (next to)
Vertex
A point where 2 sides meet or two lines cross
Degrees
A circle has 360 of these
Angle
Two rays which share a common endpoint form this
Acute Angle
An angle which has a measure of less than 90 degrees
Vertical Angeles
Angles opposite of one another at the intersection of two lines
Obtuse Angle
An angle which has a measure greater than 90 degrees but less than 180
Congruent
means "the same"
Straight Angle
An angle which measures 180 degrees
Supplementary
Two angles whose sum is 180 degrees
Complementary
Two angles whose sum is 90 degrees
Skew
Lines that never cross and are found in two different planes
Perpendicular
Lines that intersect at 90 degrees are called this
Parallel
Lines that are in the same plane that never cross
Diagonal
A line segment that connects two non-adjacent vertices of a polygon
Point
An exact location, usually represented by a dot.
Plane
A flat surface that has no thickness and extends forever. We use any three points to represent this as long as they are not on the same line.
Line
A straight path that extends forever in opposite directions
Line segment
Part of a line or ray or figure that extends from one endpoint to another
Transversal
A line that intersects two or more parallel lines that lie in the same plane
Ray
A part of a line that has one endpoint and extends forever in one direction.
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