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| a statement that two quantities are equal; an equation |
| to change the denomination or form, but not the value, of a fraction or polynomial |
| radius vector | |
| —n | |
| 1. | maths a line joining a point in space to the origin of polar or spherical coordinates |
| 2. | astronomy an imaginary line joining a satellite to the planet or star around which it is orbiting |
radius vector
|