        ### Grade 4 Math Power Words

Match the term to the correct definition.

 product a unit of measure for angles based on dividing up a circle into 360 parts. A unit of measure for temperature. hundredth a letter or other symbol that represents a number example 5 + X = 9 and x=4 to make the number sentence true intersect a number that is written using both a whole number and a fraction right triangle the answer in multiplication acute angle one of two numbers that are multiplied to give a product obtuse angle a point at the end of a line segment or ray right angle a straight path joining 2 points. the two points are called "endpoints" (------------------- ) endpoint a figure measuring exactly 90* that is formed by two rays or two line segments with a common endpoint angles a straight path that extends infinitely in opposite directions lines a straight path that starts at one point (the endpoint) and continues forever in one direction mixed number a whole number that has exactly two factors: itself and 1 perpendicular the digit two spaces to the right of a decimal can be written as 1/100 or 0.01 ray common fractions that serve as benchmarks or points of reference to help us estimate other fractions. benchmark fractions a triangle that has a right angle (90*) common denominator a figure that is formed by two rays or two line segments with a common endpoint degree crossing or meeting at right angles. The symbol means is perpendicular to decimal notation a figure measuring less than 90* that is formed by two rays or two line segments with a common endpoint line segment a model that shows the amount of surface inside a closed boundary (such as a shape labeled in square units) line of symmetry a line drawn through a figure that creates two "mirror" images of eachother parallel a whole number with more than two factors variable a dot used to separate the ones and the tenths place in decimal numbers factor if two fractions have the same denominator prime number to meet or cross composite number a figure measuring more that 90* and less than 180* that is formed by two rays or two line segments with a common endpoint remainder an amount left over when one number is divided by another number area model ( ) lines, line segments, rays or ("planes) are said to be parallel if they never cross or meet, no matter how far they extend

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