Measurements and Mathematics Terms

The distance between the center of a circle and any point on the circle's circumference: On the clock in Tom's room, the long hand showing the minutes formed the radius, extending from the center to the circumference of the round clock.

When Alice was looking for a job, she searched for one in an 8 mile radius from her home.

The relationship between two measurements of different units; As an example, rate can be exemplified by the change in distance with respect to time (miles per hour).

The famous author was producing new novels at the rate of three a year.

The inverse of a number; the reciprocal is formed by inverting the numerator and the denominator of a fraction: 0.5 is the reciprocal of 2.

A four-sided figure that has four lines at 90 degree angles: In a rectangle the opposite sides are parallel to each other and are equal in length, but are not equal in length to the lines that run perpendicular to them.

A solid that has four sides, with each junction at 90 degree angles; rectangular cuboid: In a rectangular prism, the opposite sides are equal in length and parallel to each other, but they are not equal in length to the sides that run perpendicular to them

To give a close approximation of a number by dropping the least significant numbers: A number can be rounded up or down to the nearest whole number. 78.7 can be rounded up to 79, and 77.4 can be rounded down to 77.

You can get the same sum of 1,089 every time you add certain numbers together:

1. Take any three-digit number in which the first digit is larger then the last digit (654).
2. Reverse the number and subtract the smaller number from the larger one (456; 654 - 456 = 198).
3. Reverse the result and add this number to the result (198 reversed = 891 + 198 = 1,089)
4. As shown above, the answer is 1,089 every time you use the procedures as indicated.

Any real number, or any quantity that can be measured using a single real number: Temperature, length, and mass are all scalars and it is said that a scalar has magnitude, but no direction.

A quantity with both direction and magnitude; such as, force or velocity, is called a vector.

A set of marks on a measuring instrument; usually, with numbers in increments from low to high values: After buying some detergent online, I received another email asking me to rate its effectiveness on a scale from 1 to 10. and 10 being the very best rating.

An object with three dimensions which are length, width, and height: A brick can be considered to be a solid because it is neither a fluid, an area, or or a surface.

A solid that is bounded by a curved surface: The globe or a ball are spheres

Any point measured from the outside of the sphere to the center of the sphere is equal in distance.

An instrument used to measure weight; spring scale: The object is placed on a hook attached to the spring balance and the weight is read on a scale.

A four-sided figure that has four lines arranged at 90 degree angles: The opposite sides of a square are parallel to each other and all sides are of equal length.

The calendar Jill had on her kitchen wal had big black squares around the dates of each month.

A measured unit that is used as the basis for measuring other things: A foot and a meter are standards of length.

The science and technology involved in transmitting signals over great distances: With the use of telemetry, measurements are made and other data collected at remote or inaccessible points and transmitted to receiving equipment for monitoring, display, and recording.

Originally, the information was sent over wires, but modern telemetry more commonly uses radio transmission.

Basically, the process is the same in either case. Among the major applications are monitoring electric-power plants, gathering meteorological data, and monitoring manned and unmanned space flights.

Aerospace telemetry for rockets and satellites was inaugurated with the Soviet satellite Sputnik, launched in 1957, and systems have grown in size and complexity since then.

Observatory satellites have performed as many as 50 different experiments and observations, with all data telemetered back to a ground station.

The techniques developed in aerospace have been successfully applied to many industrial operations, including the transmission of data from inside internal-combustion engines during tests, from steam turbines in operation, and from conveyor belts inside mass-production ovens.