## 8th Math Ch 4 Exponents and Roots Vocab

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ktp23  on November 16, 2011

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Ch 4 Exponents and Roots Vocab

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# 8th Math Ch 4 Exponents and Roots Vocab

 basethe number or expression that is used as a factor in a repeated multiplication
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#### Definitions

base the number or expression that is used as a factor in a repeated multiplication
exponent a mathematical notation indicating the number of times a quantity is multiplied by itself
exponential form the form of a number that is written as a base with an exponent
hypotenuse the side of a right triangle opposite the right angle
leg the 2 sides that make the right angle in a right triangle
perfect square the product when a whole number is multiplied by itself
power a mathematical notation indicating the number of times a quantity is multiplied by itself
principal square root the positive square root of a number
Pythagorean Theorem a²+b²=c²
real number all rational or irrational numbers; real numbers can be represented on the real number line
scientific notation A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.
irrational number A number whose decimal form is nonterminating and nonrepeating. Irrational numbers cannot be written in the form a/b, where a and b are integers (b cannot be zero). So all numbers that are not rational are irrational.

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