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KNOW THESE WORDS

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
ANGLE BISECTOR   A RAY THAT DIVIDES AN ANGLE INTO TWO ANGLES THAT ARE CONGRUENT  
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ANGLE OF ELEVATION   WHEN YOU LOOK UP AT AN OBJECT, THE ANGLE THAT YOUR LINE OF SIGHT MAKES WITH A LINE DRAWN HORIZONTALLY  
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BASE ANGLES OF AN ISOSCELES TRIANGLE   THE TWO ANGLES THAT ARE ADJACENT TO THE BASE OF AN ISOSCELES TRIANGLES  
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EQUIANGULAR   ALL INTERIOR ANGLES CONGRUENT  
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EQUILATERAL POLYGON   A POLYGON WITH ALL OF ITS SIDES CONGRUENT  
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EXTERIOR ANGLES OF A TRIANGLE   WHEN THE SIDES OF A TRIANGLE ARE EXTENDED, THE ANGLES THAT ARE ADJACENT TO THE INTERIOR ANGLES  
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COLLINEAR POINTS   POINTS THAT LIE ON THE SAME LINE  
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COMPLEMETARY ANGLES   2 ANGLES WHOSE MEASURES HAVE THE SUM OF 90 DEGREES  
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HEXAGON   A POLYGON WITH 6 SIDES  
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CONGRUENT ANGLES   ANGLES THAT HAVE THE SAME MEASURE  
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CONGRUENT FIGURES   2 GEOMETRIC FIGURES THAT HAVE EXACTLY THE SAME SIZE AND SHAPE.  
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CONSECUTIVE INTERIOR ANGLES   2 ANGLES THAT ARE FORMED BY 2 LINES AND A TRANSVERSAL AND LIE BETWEEN THE 2 LINES AND ON THE SAME SIDE  
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COPLANAR POINTS   POINTS THAT LIE IN THE SAME PLANE  
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HYPOTENUSE   IN A RIGHT TRIANGLE, THE SIDE OPPOSITE THE RIGHT ANGLE  
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DECAGON   A POLYGON WITH 10 SIDES  
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DILATION   A TRANSFORMATION THAT STRETCHES OR SHRINKS A FIGURES TO CREATE A SIMILAR FIGURE  
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DODECAGON   A POLYGON WITH 12 SIDES  
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ISOSCELES TRIANGLE   A TRIANGLE WITH AT LEAST 2 CONGRUENT SIDES  
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LINE SEGMENT   PART OF A LINE THAT CONSISTS OF 2 POINTS CALLED ENDPOINTS  
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MIDPOINT   A POINT THAT DIVIDES,BISECTS, A SEGMENT INTO 2 CONGRUENT SEGMENTS  
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N-GON   A POLYGON WITH N SIDES  
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OBTUSE ANGLE   AN ANGLE WHOSE MEASURE IS BETWEEN 90 AND 180 DEGREES  
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OCTAGON   A POLYGON WITH 8 SIDES  
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PARALLEL LINES   TWO LINES THAT DO NOT INTERSECT  
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PARALLELOGRAM   A QUADRILATERAL WITH BOTH PAIRS OF OPPOSITE SIDES ARE PARALLEL  
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PENTAGON   A POLYGON WITH 5 SIDSES  
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PERPENDICULAR BISECTOR   A SEGMENT,RAY,LINE, OR PLANE THAT IS PERPENDICULAR TO A SEGMENT AT ITS MIDPOINT  
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PERPENDICULAR LINES   TWO LINES THAT INTERSECT TO FORM A RIGHT ANGLE  
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PREIMAGE   THE ORIGINAL FIGURE IN A TRANSFORMATION  
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PROOF   A LOGICAL ARGUMENT THAT SHOWS A STATEMENT IS TRUE  
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QUADRILATERAL   A POLYGON WITH 4 SIDES  
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RAY   PART OF A LINE THAT CONSISTS OF A POINT CALLED AN ENDPOINT AND ALL POINTS ON THE LINE EXTEND IN ONE DIRECTION  
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RECTANGLE   A PARALLELOGRAM WITH 4 RIGHT ANGLES  
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REDUCTION   A DILATION WITH A SCALE FACTOR BETWEEN 0 AND 1  
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REFLECTION   A TRANSFORMATION THAT USES A LINE OF REFLECTION TO CREATE A MIRROR IMAGE OF THE ORIGINAL FIGURE  
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REGULAR POLYGON   A POLYGON THAT HAS ALL SIDES AND ALL ANGLES CONGRUENT  
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RHOMBUS   A PARALLELOGRAM WITH 4 CONGRUENT SIDES  
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RIGHT ANGLES   AN ANGLE WITH MEASURE EQUAL TO 90 DEGREES  
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ROTATION   A TRANSFORMATION IN WHICH A FIGURE IS TURNED ABOUT A FIXED POINT CALLED THE CENTER OF ROTATION  
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ROTATIONAL SYMMETRY   A FIGURE CAN BE MAPPED ONTO ITSELF BY A ROTATION OF 180 DEGREES OR LESS ABOUT THE CENTER OF THE FIGURE  
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SCALE FACTOR OF A DILATION   THE RATIO OF A SIDE LENGTH OF THE IMAGE TO THE CORRESPONDING SIDE LENGTH OF THE ORIGINAL FIGURE  
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SEGMENT BISECTOR   A POINT,RAY, LINE, SEGMENT, OR PLANE THAT INTERSECTS A SEGMENT AT ITS MIDPOINT  
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SIMILAR POLYGONS   TWO POLYGONS SUCH THAT THEIR CORRESPONDING SIDES ARE PROPORTIONAL AND THEIR CORRESPONDING ANGLES ARE CONGRUENT  
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SINE   OPPOSITE/HYPOTENUSE  
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COSINE   ADJACENT/HYPOTENUSE  
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TANGENT   OPPOSITE/ADJACENT  
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SKEW LINES   LINES THAT DO NOT INTERSECT AND ARE NOT COPLANAR  
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SQUARE   A PARALLELOGRAM WITH FOUR CONGRUENT SIDES AND FOUR RIGHT ANGLES  
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STRAIGHT ANGLE   AN ANGLE WHOSE MEASURE EQUAL TO 180 DEGREES  
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SUPPLEMENTARY ANGLES   TWO ANGLES WHOSE SUM IS 180 DEGREES  
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TRANSLATION   A TRANSFORMATION THAT MOVES EVERY POINT OF A FIGURE THE SAME DISTANCE IN THE SAME DIRECTION  
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TRAPEZOID   A QUADRILATERAL WITH EXACTLY ONE PAIR OF PARALLEL SIDES CALLED BASES  
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TRANSVERSAL   A LINE THAT INTERSECTS TWO OR MORE COPLANAR LINES AT DIFFERENT POINTS  
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TRIANGLE   A POLYGON WITH 3 SIDES  
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VERTICAL ANGLES   TWO ANGLES WHOSE SIDES FORM TWO PAIRS OF OPPOSITE RAYS  
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