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