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Pre-Algebra 1st Tri
1st trimester vocabulary
Term | Definition |
---|---|
Ratio | A comparison of two quantities by division. |
Rate | A ratio that compares two quantities with different units. |
Unit Rate | A rate that is simplified so that it has a denominator of 1 unit. |
Rational Numbers | All numbers that can be written as fractions. This includes all natural numbers, whole numbers, and integers. |
Integers | Positive and negative whole numbers. |
Radius | Any line segment from the center to a point on a circle. It is always half of the diameter |
Diameter | Any line segment from one point to another through the center of a circle. It is always 2 times the radius. |
Circumference | The distance around a circle (perimeter). It is always the diameter times pi. |
Area of a Circle | The space inside of a circle. The area is always equal to the square of the radius times pi. |
Scale Drawing/Model | A drawing or model that shows a real object with accurate sizes that are reduced or enlarged by a certain amount. |
Scale or Scale Factor | A ratio that compares the measurement of the scale drawing or model to the measurements of the real object. |