TERMINOLOGY - LINES AND ANGLES
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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| POINT | MARKS AN EXACT LOCATION
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| LINE | A COLLECTION OF POINTS IN A STRAIGHT PATH EXTENDING ENDLESSLY IN BOTH DIRECTIONS
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| LINE SEGMENT | PART OF A LINE BETWEEN TWO POINTS
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| RAY | PART OF A LINE WITH ONE ENDPOINT THAT EXTENDS ENDLESSLY IN ONE DIRECTION
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| ANGLE | FORMED BY TWO RAYS WITH THE SAME ENDPOINT CALLED A VERTEX
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| VERTEX | END POINT SHARED BY TWO RAYS
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| CONGRUENT ANGLES | TWO ANGLES HAVING THE SAME MEASURE
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| LINEAR PAIR | 2 supplementary adjacent angles whose noncommon sides form a line
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| VERTICAL ANGLE | ANGLES ON OPPOSITE SIDES OF THE INTERSECTION OF TWO LINES
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| ADJACENT ANGLES | 2 nonstraight and nonzero angles that have a common side in the interior of the angle formed by the noncommon sides
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| CORRESPONDING ANGLES | any pair of angles in similar locations with respect to a transversal
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| TRANSVERSAL | a line that intersects 2 others
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| ALTERNATE INTERIOR ANGLES | - interior angles on alternate sides of the transversal (not on the same parallel line)
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| ALTERNATE EXTERIOR ANGLE | - exterior angles on alternate sides of the transversal (not on the same parallel line)
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| SUPPLEMENTARY ANGLES | TWO ANGLES WHOSE SUM IS 180 DEGREES
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| COMPLIMENTARY ANGLES | TWO ANGLES WHOSE SUM IS 90 DEGREES
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| BISECT | DIVIDE AN ANGLE OR SEGMENT INTO TWO CONGRUENT ANGLES OR SEGMENTS
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| PLANE | AN INFINITE FLAT SURFACE
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| PARALLEL LINES | LINES ON A PLANE THAT NEVER MEET
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| TRANSVERSAL | LINE THAT INTERSECTS TWO OR MORE PARALLEL LINES
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| CORRESPONDING ANGELS | ANGLES FORMED BY TWO LINES AND A TRANSVERSAL
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| MIDPOINT | THE POINT THAT DIVIDES A SEGMENT INTO TWO CONGRUENT SMALLER SEGMENTS
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| PERPENDICULAR LINES | LINES, RAYS, OR LINE SEGMENTS THAT INTERSECT AT RIGHT ANGLES
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| PERPENDICULAR BISECTOR | A LINE, RAY OR SEGMENT THAT INTERSECTS A SEGMENT AT ITS MIDPOINT AND IS PERPENDICULAR
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| SKEW LINES | TWO LINES THAT DO NOT INTERSECT AND ARE NOT PARALLEL; non-coplanar (NOT WITHIN THE SAME PLANE) lines that don't intersect
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| QUADRALATERAL | A FOUR SIDED FIGURE (E.G. RECTANGLE, PARALLELOGRAM, RHOMBUS, TRAPEZOID); THE SUM OF THE MEASURES OF THE ANGLES OF ANY QUADRALATERAL IS 360 DEGREES; ANY QUADRALATERAL CAN BE DIVIDED INTO TWO TRIANGLES
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| PARALELLOGRAM | a quadrilateral with two pair of parallel sides and two pair of congruent sides
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| RHOMBUS | a parallelogram with four congruent sides
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| TRAPEZOID | a quadrilateral that has ONLY one pair of parallel sides
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| Isoscoles trapezoid | a trapezoid that has a pair of equiangular base angles
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| Isoscoles triangle | a triangle with two sides of equal length
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| RECTANGLE | A PARALLELOGRAM WITH FOUR RIGHT ANGLES
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| POLYGON | A GEOMETRIC FIGURE WITH AT LEAST THREE SIDES
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| REGULAR POLYGON | A POLYGON IN WHICH ALL OF THE SIDES AND ANGLES ARE CONGRUENT
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| POLYGON - SUM OF ANGLES = | (NUMBER OF SIDES - 2)*180
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| (n-2)*180 | SUM OF POLYGON ANGLES
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| AREA OF GEOMETRIC FIGURE | THE NUMBER OF SQARE UNITS NEEDED TO COVER THE FIGURE
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| PERIMETER | THE DISTANCE AROUND A POLYGON
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| AREA OF A TRIANGLE | 1/2 base * height (1/2bh)
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| AREA OF A PARALLELOGRAM | base * height (bh)
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| AREA OF A TRAPEZOID | 1/2h(b1 + b2)
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Created by:
hgerlach
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