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It's because we don't measure it directly but use measurements of two lengths to compute result. Our area mesurement depends then on precision of some other measured quantities.

Q: To find the area of a rectangle multiply the length by the width Why is area called a derived quantity?

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it is called a CUBOID

Rectangles do not have congruent lines. A square can always be called a rectangle. But a rectangle can't always be a square.

Variable

Variable

A variable.

Related questions

No, voltage is not a derived quantity. It is a fundamental physical quantity that represents the electric potential difference between two points in a circuit. Voltage is measured in volts and is a key parameter in electricity and electronics.

An area, in its simplest form is derived by multiplying together two lots of the basic quantities - lengths.

Fundamental quantities are quantities that can be measured such as mass, length and temperature. Derived quantities are quantities that has to be calculated such as pressure, volume and work done.AnswerThe SI does not define 'fundamental quantity', instead it uses the term 'Base Unit'. All other units are 'Derived Units', so-called because they are each derived from combinations of Base Units.

It is called a base quantity.However, the distinction between a base quantity and a derived quantity is often not clear. For example, the second and metre are meant to be the base units for time and length. But the metre itself is defined in terms of the distance travelled by light, through vacuum, in 1/299,792,458 of a second. Consequently, a metre itself can be considered a derived unit.

It is a derived unit. It measure distance traveled per unit of time. For example meter per second or m/s. Speed or velocity as it is sometimes called is derived from the units for distance and time.

Add the length and the width together. Then multiply it by two. You did it! This is also called the perimeter.

The rectangle which is equilateral is called as square.

It is called a rectangle!

no, but a square can be called a rectangle.

In order for two quantities to be in the Gold Ratio, also called the Golden Mean, then the ratio of the sum of the quantities to the larger quantity has to be equal to the ratio of the larger quantity, to the smaller one. The Mathematical value of the Golden Mean is 1.6180339887.

What is a squashed rectangle called

Pressure is considered a derived quantity because it is calculated from fundamental quantities (force and area). Pressure is defined as force per unit area, so it cannot be measured directly but is derived from other measurements.