Math
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| rectangle | a parallelogram w/ 4 right angles
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| ray | a part of a line that starts at one endpoint and extends forever
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| complementary angles | two angles whose measures add to 90
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| center of rotation | the point about which a figure is rotated
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| congruent | having the same size and shape
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| correspondence | the relationship between 2 or mre objects that are matched
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| equilateral triangle | a triangle w/ 3 congruent sides
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| image | a figure resulting from a transformation
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| isosceles triangle | a triangle w/ at least 2 congruent sides
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| line | a straight path that extends w/o end in opposite directions
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| line of symmetry | the imaginary "mirror" in line symmetry
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| line symmetry | a figure has line symmetry if one half is a mirror-image of the other half
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| obtuse angle | an angle whose measure is greater than 90 but less than 180
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| obtuse triangle | a triangle containing one obtuse angle
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| parallel lines | lines in a plane that do not intersect
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| parallelogram | a quadrilateral w/ 2 pairs of parallel sides
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| perpendicular lines | lines that intersect to form right angles
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| plane | a flat surface that extends forever
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| point | an exact location is space
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| polygon | a closed plane figure formed by 3 or more line segments that intersect only at their endpoints (vertices)
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| vertical angles | a pair of opposite congruent angles formed by intersecting lines
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| rhombus | a parallelogram w/ all sides congruent
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| right angle | an angle that measures 90
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| right triangle | a triangle containing a right angle
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| rise | the vertical change when the slope of a line is expressed as the ratio rise over run
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| rotation | a transformation in which a figure is turned around a point
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| rotational symmetry | a figure has rotational symmetry if it can be rotated less than 360 around a central point and coincide w/ the original figure
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| run | the horizontal change when the slope of a line is expressed as the ratio rise over run
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| scalene triangle | a triangle w/ no congruent sides
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| segment | a part of a line between 2 endpoints
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| semiregular tessellation | a tessellation formed w/ 2 or more regular polygons in which every vertex is identical
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| slope | a measure of the steepness of a line on a graph, the rise divided by the run
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| square | a rectangle w/ 4 congruent sides
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| supplementary angles | two angles whose measures have a sum of 180
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| tessellation | a repeating pattern of plane figures that completely cover a plane with no gaps or overlaps
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| transformation | a change in size or position of a figure
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| translation | a movement (slide) of a figure along a straight line
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| transversal | a line that intersects two or more lines
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| trapezoid | a quadrilateral w/ exactly one pair of parallel lines
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| regular tessellation | a tessellation formed by using regular polygons
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| regular polygon | a polygon w/ congruent sides and angles
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| angle | a figure formed by 2 rays w/ a common endpoint called the vertex
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| acute triangle | a triangle w/ angles measuring less than 90
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| acute angle | an angle that measures less than 90
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| reflection | a transformation of a figure that flips the figure across a line
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| Triangle Sun Theorem | the theorem that states that the measures of the angles in a triangle add up to 180
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Created by:
mdancer
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