Acute Angle- An angle that measures less than 90 degrees.
Addend- A number added to another in an addition problem.
Angle- A figure formed by two rays that have a common end point.
Area- The number of units needed to cover a surface.
Associative Property of Addition- Changing the grouping of addends does not change the sum. I.e. 3+(1+6)=10, 1+(6+3)=10
Associative Property of Multiplication- Changing the grouping of factors does not change the product. I.e. (1x2)x5=10, (1x5)x2=10
Bar Graph- A graph that uses bars to show data.
Capacity- Max. amount a container can hold.
Celsius(C)- The metric tempeture scale in which 0 degrees is the freezing point and 100 degrees is the boiling point of water.
Circle- Closed plane curve with every point the same distance from the center.
Circle graph- A graph that uses a circle to show all the parts of the whole.
Circumference- The distance around a circle.
Common factor- A number that is a factor of 2 or more numbers. I.e. common factors of 18 and 24: 1,2,3,6
Common multiple- a number that is a multiple of 2 or more numbers. I.e. common multiples of 2 and: 6, 12, 18, 24, 30, 36...
Commutaive property of addition- Changing the order of addends does not change the sum. I.e. 2+3=5 3+2=5
Commutative property of multiplication- Changing the order of factors does not change the product. I.e. 3*5=15 5*3=15
Compatable numbers- Numbers that are easy to work with mentally and are usedin place of actual numbers to get an estimate. I.e. 237/62-----240/60-----Estimate=4
Composite number- A number that has more than 2 factors.
Congruent- Equal in measure.
Congruent figures- Figures that have the same shape and size.
Cube- Solid having 6 square faces the same size.
Customary system- System of measurement that uses foot, quart, pound, and degree Fahrnheit.
Cylider- A solid that has 2 parallel circular bases and 1 curved surface.
Data- Facts and figures from which conculsions can drawn.
Decimal- A number with one or more digits to the right of a decimal point.
Decimal point- A symbol used to seperate ones and tenths in decimals or dollors and cents in money acounts. I.e. 1.24, $3.45.
Degree(angles)- A unit for measuring angles.
Degree(temperature)- A unit for measuring temperature.
Denominator- The number written bellow the bar in a fraction.
Diagonal-A line segment that joins two vertices of a polygon, but is not a side of the polygon.
Diameter- The distance across a circle through the center.
Differance- Answer for a subtraction problem.
Digit- Any one of the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9 used to write numbers.
Distributive property of multiplication- The product of a number and the sum of two numbers is equal to the sum of the two products. I.e. 3*(2+4)=(3*2)+(3*4) Don't worry if you don't get this one, it's really tricky!
Dividend- The number that is divided in a division problem. I.e. 36/9=4
Divisible- Capable of being divided into equal parts without a remainder.
Diviser- The number by which the dividend is divided by in a division problem. I.e. 39/9=4
Double bar graph- A bar graph that allows you to compare two sets of data.
Double line graph- A line graph that allows you to compare two sets of data over time.
Endpoints- Point at end of line segment.
Equilateral triangle- Triangle that has three congruent sides and three congruent angles.
Equivalent- Having the same value.
Estamate- Educated guess at a number unknown.
Even number- Whole number ending in 2, 4, 6, 8, 0.
Factors(multiplication)- Numbers multiplied. I.e. 3*3=9.
Factors(division)- Numbers that divide another number with no remainder. I.e. 62/2=3.
Fahrenheit- The customary temperature scale in which 32 degrees F is the freezing point of water and 212 degrees F is the boiling point of water.
Fraction- A number that names part of a whole or part of a set. A fraction is written with a numerator and denominator. I.e. 1/4.
Graph- A picture that shows data by using bars, lines, symbols, or fractions of a circle.
Greatest common factor- The largest factor of two or more numbers. I.e. greatest common factor of 12, 18 and 30: 6.
Hexagon- A polygon with six sides.
Intersect- To cross or meet.
Isosceles triangle- A triangle that has at least two congruent sides.
Line- A collection of points along a straight path that goes on forever.
Line Graph- A graph that displays data by using connected line segments.
Line segment- Part of a line consisting of two endpoints and all the points in between.
Mass- The amount of matter in an object.
Mean- The average of a set of numbers, found by adding the numbers in the set and dividing by the number of addends.
Median- The middle number in a set when the numbers are ordered from least to greatest.
Metric system- The measurement system that uses meter, liter, gram and degree Celsius.
Mixed number- A number that has a whole number part and a fraction part. I.e. 2 1/2.
Mode- The number that occurs most often in a set of data.
Multiple- A product of two whole numbers. I.e. 4*2=8. The number 8 is a multiple of 4 and 2.
Multiplication property of one- If any number is multiplied by one, the product is the same as that number. I.e. 4*1=4.
Multiplication property of zero- If any number is multiplied by zero, the product is zero. I.e. 0*238=0.
Negative numbers- Numbers less than zero; numbers that show a loss or decrease. I.e. -58.
Numerator- The number written above the bar in a fraction. I.e. 1/4.
Obtuse angle- An angle that measures more than 90 degrees and less than 180 degrees.
Odd number- A whole number ending in 1, 3, 5, 7, or 9. I.e. 99.
Ordered pair- A pair of numbers that gives the coordinates of a point on a graph.
Order of operations- Rules for finding the value of an expression.
Parallelogram- A quadrilateral with two pairs of parallel sides.
Pentagon- A polygon with five sides.
Percent- A ratio based on 100.
Perimeter- The distance around a figure.
Place value- The value of a digit based on its position in a number. I.e. In 324, the 3 is the hundreds place and stands for 300.
Point- An exact place or position in space, represented by a dot.
Polygon- A closed figure formed by line segments joined only at their endpoints.
Prime number- A number greater than 1 that has exactly two factors, itself and 1.
Product- The answer in a multiplication problem. I.e. 5*3=15.
Quadrilateral- A polygon with four sides.
Quotient- The answer in a division problem. I.e. 36/9=4.
Radius- The distance from the center of a circle to any point on the circle.
Range- The difference between the greatest number and least number in a group.
Rate- A comparison of two quantities with different units of measure.
Ratio- a comparison of two quantites with the same units of measure.
Ray- A part of a line that has one endpoint.
Reciprocals- Two numbers whose product is 1. The reciprocal of a fraction is formed by interchangeing the numerator and denominator.
Rectangle- A quadrilateral having four right angles.
Regular polygon- A polygon with congruent sides and congruent angles.
Rhombus- A quadrilateral with four congruent sides.
Right angle- An angle measuring 90 degrees.
Right triangle- A triangle with a 90 degree angle.
Scalene triangle- A triangle that has no conguent sides or congruent angles.
Similar figures- Figures that have the same shape, but need not have the same size.
Sphere- A solid figure that has the shape of a ball.
Square- A figure with four right angles and four equal sides.
Sum- The answer in an addition problem. I.e. 6+5=11.
Surface area- The sum of the areas of all faces or surfaces of a solid.
Trapezoid- A quadrilateral with only one pair of parallel sides.
Triangle- A polygon with three sides and three vertices.
Vertix- The corner point of an angle, polygon, or solid.
Volume- The number of cubic units of space taken up by a solid.
Whole number- Any of the numbers 0,1,2,3,4,5,and so on.
Zero property of addition- The sum of zero and any number is that number. I.e. 8+0=8