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Definition
| The distance of a number from zero; the positive value of a number. |
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| A positive angle measuring less than 90 degrees. |
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| A triangle each of whose angles measures less than 90 degrees. |
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The number zero is called the additive identity because the sum of zero and any number is that
number. |
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Term
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Definition
| The additive inverse of any number x is the number that gives zero when added to x. The additive inverse of 5 is -5. |
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Definition
| Two angles that share both a side and a vertex. |
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Definition
| The union of two rays with a common endpoint, called the vertex. |
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Definition
| a portion of the circumference of a circle. |
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Term
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Definition
| The number of square units that covers a shape or figure. |
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Term
| associative property of addition |
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Definition
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