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A letter that represents a number (or numeral) in a problem is called a
pronumeral.
For example, the formula for the area of a rectangle is:
Area of a rectangle = length × width
If A represents the area of the
rectangle, l represents the length of
the rectangle and w represents the width
of the rectangle, then we can write the formula
for the area of the
rectangle as follows:
A = l × w
In this formula, the letters A, l and w are called
pronumerals.
Note:
A pronumeral is a letter used in a problem to represent the measurement
of a quantity. We often choose the first letter of the name of a quantity.
For example, the measurement of the base of a triangle will be
represented by b.
Key Term
pronumeral
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