Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Geometry Chapter 1
Chapter 1 only
| Term | Definition |
|---|---|
| Point | A dot in space. A location with no dimension. |
| Line | A connected straight path. It has no thickness and continues forever. |
| Plane | A flat surface. It has no thickness but goes on forever. |
| Line Segment | A line but it is bounded by two points. It has no thickness. |
| Ray | A line with a fixed starting point but has no endpoint. |
| Parallel | Two lines that don't intersect on the same plane. |
| Coplanar | Two points on the same plane. |
| Collinear | Two points on the same line. |
| Postulate | A statement believed true without a proof. |
| Segment Addition Postulate | Let A, B and C be 3 collinear points If B is between A&C, then AB+BC= AC |
| Distance Formula | d=√((x_2-x_1)²+(y_2-y_1)²) |
| Midpoint | The point that divides the line segment into two segments of the same length. |
| Segment Bisector | Any line ray or segment that passes through midpoint. |
| Midpoint Formula | (x₁ + x₂)/2, (y₁ + y₂)/2 |
| Angle | A figure formed by two rays. |
| Vertex | Common endpoint of angle. |
| Degrees | Common measurement unit for circular arcs |
| Acute Angle | An angle that is more than 0 degrees but less than 90. |
| Right Angle | An angle that is equal to 90 degrees. |
| Obtuse Angle | An angle that is more than 90 degrees but less than 180. |
| Angle Bisector | A ray that divides an angle into 2 angles of the same measure. |
| Angle Addition Postulate | If point A is in the interior of ∠ SYR then m ∠SYR= m ∠SYA + m ∠RYA |
| Transformation | A function that changes position, size, or shape of a figure. |
| Image | Image after the change |
| Preimage | Image before the change. |
| Rigid motion | Move shape without changing size or shape (translation, reflection, rotation) |
| Conjecture | A statement believed to be true. |
| Inductive reasoning | A type of reasoning that uses specific cases to make a rule of belief that is true. |
| Deductive Reasoning | The process of using logic to prove all cases are true. |
| Theorem | A statement that you can prove using a series of logical steps. |
| Counterexample | An example that shows a conjecture to be false. |
| Addition Property of Equality | If a=b then a + c = b + c |
| Subtraction Property of Equality | If a=b then a - c = b - c |
| Multiplication Property of Equality | If a=b then ac = bc |
| Division Property of Equality | If a=b then a/c=b/c, c can't be 0 |
| Reflexive Property of Equality | A number is always equal to itself, a = a |
| Symmetric Property of Equality | If a=b then b = a |
| Transitive Property of Equality | If a=b and b=c then a=c |
| Substitution Property of Equality | If a=b then you can substitute b in for a in any expression |
| Linear Pair Theorem | If two angles form a linear pair, then the measures of the angles add up to 180 degrees. |
Created by:
user-1713614
Popular Math sets