| A | B |
|---|
| altimeter | an instument that measures the height at which an object, such as an aircraft, is located. |
| barometer | an instrument that measures the air pressure of the atmosphere and is widely used in teh study and forecasting of weather |
| diameter | a straight line segment that passes through the center of a circle or sphere with both of its ends on the boundary |
| geometry | the branch of mathematics dealing with measurements and relationships of points, lines, angles, surfaces, and shapes |
| kilometer | a unit of length equal to 1000 meters, or about 0.6214 mile. |
| metric | referring to a system of weights and measures based on units of 10, 100, and 1000. |
| metronome | an instrument used to mark time in steady beats at various speeds |
| micrometer | an instrument used for measuring very small distances. |
| odometer | an instrument that measures distance traveled by a vehicle |
| perimeter | the sume of the lengths of the segments that form the sides of a geometrical figure such as a polygon or circle; outer limits of an area |
