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# Butler Gr. 3 PSSA M2

### Math Vocabulary Practice/ group 2

TermDefinition
Obtuse angle An angle with a measure more than 90 degrees.
Ordered Pair A pair of numbers used to locate a point on a coordinate grid. The first number tells how far to move horizontally, and the second number tells how far to move vertically.
Parallel lines Lines that never intersect and are always the same distance apart.
Perimeter The distance around a figure.
Perpendicular lines Two lines, segments or rays that intersect to form right angles.
Pictograph A graph that uses pictures to show and compare information.
Ray A part of a line that has one endpoint and continues without end in one direction.
Reflection (flip) A transformation that produces the mirror image of a figure.
Right angle An angle that measures exactly 90 degrees.
Rotation (turn) A movement of a figure that turns that figure around a fixed point.
Tally chart A table that uses tally marks to record data.
Translation (slide) A movement of a figure to a new position without turning or flipping it.
Vertex A point where lines, rays, sides of a polygon or edges of a polyhedron meet (corner).
Equation A statement that two mathematical expressions are equal.
Created by: ldurns
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