2Obtuse AngleAn obtuse angle is more than 90° but less than 180° In other words, it is between a right angle and a straight angle.
3Right AngleA right angle is an angle which is equal to 90°, one quarter ( 1 /4) of a full revolution or turn.
4Straight AngleA straight angle changes the direction to point the opposite way. It looks like a straight line. It measures 180° (half a revolution, or two right angles)
5DecimalBased on 10 Example: the numbers we use in everyday life are decimal numbers, because there are 10 of them (0,1,2,3,4,5,6,7,8 and 9). Often "decimal number" is also used to mean a number that uses a decimal point followed by digits as a way of showing values less than one. Example: 1.9 is a decimal number (one and nine tenths)
6Greatest Common Factor The highest number that divides exactly into two or more numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor. Abbreviated "GCF". Also called "Highest Common Factor6 = 1, 2, 3, 630 = 1, 2, 3, 5, 6, 10, 15, 30GCF = 6
7Simplest Form Making a fraction as small as possible To do this you divide by the GCFAlso called reducing a fraction or writing it in lowest terms.
8Reducing a Fraction Making a fraction as small as possible To do this you divide by the GCFAlso called simplest form or writing it in lowest terms.
9Greater ThanBigger. The symbol > means greater than (the symbol < means less than). Example: 5 > 3 shows that 5 is greater than 3
10Less ThanSmaller. There is a special symbol used to show that one number is smaller than another The symbol < means less than (the symbol > means greater than). Example: 4 < 9 shows that 4 is less than 9
11Simplify a fraction Making a fraction as small as possible To do this you divide by the GCFAlso called reducing a fraction or writing it in lowest terms.
12Lowest Terms Making a fraction as small as possible To do this you divide by the GCFAlso called reducing a fraction or writing it in lowest terms.
13Common The same Factors of 12 = 1, 2, 3, 4, 6, 12 18 = 1, 2, 3, 6, 9, 18They have the factors 1,2,3, and 6 incommon
14Least Common MultipleThe smallest number that is a multiple of two or more numbers. Example: the Least Common Multiple of 3 and 5 is 15, because 15 is a multiple of 3 and also a multiple of 5. Other common multiples include 30 and 45, etc, but they are not the smallest (least). (Also called Lowest Common Multiple)
15NumeratorThe top number in a fraction. Shows how many parts we have.
16EquivalentHaving the same value. Example 0.5 is equivalent to ½