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Math 8th Grade Geometry Words - Module 2
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Gravity
Terms in this set (18)
transformation
a movement of a geometric figure
basic rigid motion
a rotation, reflection, or translation of a figure on a plane
translation
a transformation where a geometric figure is slid horizontally, vertically, or both
rotation
a transformation where a geometric figure is turned, moved, or rotated around a point, d degrees
reflection
a transformation where a geometric figure is flipped over a line of symmetry
image of a point or a figure
refers to a point or figure that has been transformed
sequence of transformations
more than one transformation
vector
line segment together with the direction given by connecting the initial point to the terminal point
congruence
sequence of basic rigid motions
transversal
the third line that intersects a given pair of lines at different points
ray
a line with a starting point (initial point), but no end point (terminal point)
line segment
part of a line that connects two endpoints; two definite endpoints
angle
the amount of turn between two straight lines that have a common end point (the vertex)
parallel lines
two lines on a plane that never meet; they are always the same distance apart
perpendicular lines
lines that are at right angles (90°) to each other
supplementary angles
two Angles are Supplementary when they add up to 180 degrees; they don't have to be next to each other, just so long as the total is 180 degrees
complementary angles
two Angles are Complementary when they add up to 90 degrees (a Right Angle); they don't have to be next to each other, just so long as the total is 90 degrees
vertical angles
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