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Basic math glossary-RBasic math glossary-R define words beginning with the letter R Radius: The distance from the center of a circle to the edge of a circle. Rate: Rate means percent. Rate of commission: A percent used to calculate the commission. Rate of interest: A percent charged when borrowing money. Ratio: The comparison of two numbers using division Ray: A line with a beginning point but no endpoint. Real distance: As opposed to distance on a map, it is the actual distance between two locations. Rectangle: A parallelogram with four right angles. Rectangular prism: A prism that has rectangular faces Reflex angle: An angle whose measure is bigger than 180 degrees, but less than 360 degrees. Remainder: The amount left over when a number does not divide another number evenly. Rectangle: A parallelogram with four right angles. Repeating decimal: A decimal where the same series of digits repeat Rhombus: A parallelogram with four equal sides and opposite angles that are equal. Right angle: An angle whose measure is 90 degrees. Right triangle: A triangle with one right angle. Rhombus: A parallelogram with four equal sides and opposite angles that are equal.
Fun math game: Solve math problems and eat the mathman
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