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GEOMETRY A1
VOCAB.
| Question | Answer |
|---|---|
| angle | the intersection of nonlinear rays at a a common endpoint. |
| angle bisector | a ray that divides an angle into two congruent angles. |
| collinear | points that lie on the same plane. |
| angle | the intersection of nonlinear rays at a a common endpoint. |
| angle bisector | a ray that divides an angle into two congruent angles. |
| collinear | points that lie on the same plane. |
| congruent | having the same measure. |
| coplanar | points that lie on the same plane. |
| midpoint | the point on a segment exactly halfway betweeen the endpoint of the segments. |
| perimeter | the sum of the lengths of the sides on a polygon. |
| perpendicular | lines,segements,or rays that form right angles. |
| polygon | a closed figure formed by a finite number of coplanar segments callde side |
| segment bisectors | a segment, line or plane that inersects a segment at its midpoint |
| vertex | the common endpoint |
| volume | a measure of the amount of space enclosed by a three dimensional figure. |
| adjacent | common vertex and side with no common interior points (nothing overlaps) |
| linear pair | adjacent angles that are formed by opposite rays. |
| vertical angles | two nonadjacent angles formed by tow lines (always form a "X") |
| vertical angles | two nonadjacent angles formed by tow lines (always form a "X") |
| complementary angles | two angle whose sum equal 90 |
| complementary angles | two angle whose sum equal 90 |
| supplementary angles | two angle whose sum equal 180 (any linear pair=180) |
| supplementary angles | two angle whose sum equal 180 (any linear pair=180) |
| perpendicular linea | form 90 angles |
| perpendicular linea | form 90 angles |
| inductive reasoning | use number of specific example to arvie at a conclusion. |
| conjecture | a concluding statement. |
| counter example | an example that proves a statement is false . |
| commpound statement | joined by "AND.OR" |
| conjunction statement | joined by "AND" |
| disconjunction statement | joined by "OR" |
| negation | not "P" is the negation of the statement "P". |
| conditional statement | a statment that can be written in "IF-THEN FORM". |
| hypothesis | the phrase of a conditional statement that immediatley follows the word "IF". |
| conclusion | the phrase of a conditional statement that immmediatley follows the word "THEN". |
| converse | formed by exchanging hypothesis and conclusion. |
| inverse | formed by negating both the hypothesis and the conclusion. |
| contrapositive | formed by negating both parts of the converse. |
| PARALLEL LINES | NEVER INTERSECT (CROSS) IN THE SAME PLANE (COPLANAR). |
| TRANSVERSAL | A LINE THAT GOES THROUGH TWO OR MORE LINES AT TWO DIFFERENT POINTS. |
| SKEW LINES | DO NOT INTERSECT AND ARE NOT COPLANAR (NOT ON THE SAME PLANE) |
| PARALLEL PLANES | PLANE THAT DO NOT INTERSECT.(CROSS) |
| VERTICAL ANGLES ARE ALWAYS WHAT...? | EQUAL |
| ALTERNATE EXTERIOR ANGLES | NON ADJACENT INTERIOR ANGLES THAT LIE ON THE OPPOSITE SIDE OF THE TRANSVERSAL. |
| ALTERNATE EXTERIOR ANGLES | NONADJACENT EXTERIOR ANGLES THAT LIE ON THE OPPOSITE SIDE OF THE TRANSVERSAL. |
| CONSECTIVE INTERIOR ANGLES | INTERIOR ANGLE ON THE SAME SIDE OF THE TRANSVERSAL. |
| CORRESPONDING ANGLES | LIE ON THE SAME SIDE OF THE TRANSVERSAL ON THE SAME SIDE OF THE LINES. |
| VERTICAL LINE SLOPE IS ALWAYS...? | UNDEFINEED |
| HORIZONTAL LINE SLOPE IS ALWAYS...? | ZERO (0) |
| SLOPE OF PARALLEL LINES | VERTICAL LINES ARE PARALLEL & NON VERTICAL LINES HAVE THE SMAE SLOPE. |
| SLOPE OF PERPENDICULAR LINES | 2 NON VERTICAL LINES ARE PERPENDICULAR ONLY IF THE PRODUCT OF THEIR SLOPE IS -1. |