Factors that two numbers have in common are called the common factors of those numbers.
Example:
The factors of 20 are 1, 2, 4, 5, and 20.
The factors of 24 are 1, 2, 4, 6. 12 and 24.
The common factors of 20 and 24 are 2 and 4.
altitude
the height of a geometric figure
kite
A kite is a quadrilateral shape with two pairs of adjacent (touching), congruent (equal-length) sides.
trapezoid
a quadrilateral with only one pair of parallel sides
greatest common factor (GCF)
The largest factor two or more numbers have in common.
Example:
What is the GCF or 12 and 18?
The factors of 12= 1, 2, 3, 4, 6, 12
The factors of 18= 1, 2, 3, 6, 18
The GCF is 6
relatively prime numbers
two numbers that do not have any common factors other than 1.
Example:
12 and 13 are relatively prime numbers.
The only factor they have in common is 1.
Distributive Property
The distributive property states that for any numbers a, b, and c:
a(b+c) = ab+ ac
Example: 2(6+3) = (2x6) + (2x3)
Commutative Property of Multiplication
For any numbers a and b, the product a(b) is equal to the product (b)a
Example:
a(b) = (b)a or 3(6) = (6)3
least common multiple (LCM)
the smallest multiple (other than 0) that two or more numbers have in common.
Example:
What is the LCM of 2 and 5?
Multiples of 2 = 2, 4, 6 ,8 , 10, 12.
Multiples of 5 = 5, 10, 15
The LCM is 10
parallelogram
a four-sided figure with opposite sides parallel and equal in length.
