Math

Refine Search

How many lines of symmetry are in a square?

A line of symmetry divides an object into perfectly matching sides. Therefore, a rectangle only has two lines of symmetry because it cannot be divided diagonally to create two matching sides. A triangle, on the other hand, has three lines of symmetry, as it can be divided through each point and through the middle of the other side three times. A kite shape only has one line of symmetry--vertically down the middle of the shape.

Continue Reading

What is a Venn diagram?

Each circle in a Venn diagram represents a set. A set is typically some type of mathematical number such as positive integers, negative integers, real numbers, or rational numbers. Venn diagrams can be used with other types of sets that may not pertain to mathematics. These sets contain what are referred to as elements. For example, these set elements could be mammals, NFL football teams, universities in Michigan, or street names in California.The purpose of a Venn diagram is show relationship or lack of relationship between the sets. If set A, the first circle in the Venn diagram, contains th..

Continue Reading

How many lines of symmetry does a hexagon have?

For regular polygons with an odd number of sides, each line of symmetry bisects one angle and the side opposite. For regular polygons with an even number of sides, the lines of symmetry alternate between bisecting opposite angles, and bisecting opposite sides. It is possible to construct irregular polygons that are symmetrical, but no irregular polygon can have as many lines of symmetry as a regular polygon with the same number of sides.

Continue Reading

What is the cube root of 64?

The cube root of 64 is 4 because 4 times 4 equals 16, and 16 times 4 equals 64. The cube root of a number is similar to the square root of a number, except the latter is only to the power of two instead of three. Beyond the cube root is the fourth root, fifth root and so on. The key is how many times a number is multiplied by itself.

Continue Reading

What are the factors of the number 23?

A prime number is any positive number that is only divisible evenly by itself and the number one. Since the number 23 only has two factors, itself and one, it is a prime number.\nA prime number only refers to whole numbers, not decimals or fractions. If a positive number is not a prime number, it is a composite number. A composite number has at least one additional divisor other than the number one and itself.

Continue Reading

What is 0.875 as a fraction?

The greatest common divisor, or greatest common factor, between 875 and 1000 is 125, or the same amount the fraction was reduced by the numbers 25 times 5. The greatest common divisor is the largest number that both portions of the fraction can be divided by evenly. If the greatest common factor is unknown, start with the easiest factor, and divide both numbers by that term to lower the numerator and denominator.

Continue Reading

How do you determine how many entries are in a matrix?

The entries in a matrix are organized into rows and columns. The number of rows and columns are known as the dimensions. By convention, the notation for matrix dimensions is rows by columns. For example, if each row of a matrix each has two entries and each column has three entries, the matrix's dimensions are two by three. If each row has four entries and each column has three entries, the matrix's dimensions are four by three.\nThe position of an entry in a matrix is indicated by a subscript of the respective entry's row followed by its column. For example, if an entry a has t..

Continue Reading

How did Leonard Euler contribute to mathematics?

Euler was involved in various aspects of mathematics and physics, which include graph theory, number theory, calculus, trigonometry, topology, fluid mechanics, optics, magnetism and electricity. Euler is credited with inventing the symbols "e," "f(x)" and "i," which is the symbol for the square root of a negative number. Euler's major contributions that were named after him include Euler's formula, Euler's theorem, Euler angles, Euler-Lagrange equation, Euler numbers, Eulerian numbers and Euler primes.

Continue Reading

What are equivalent decimals?

Equivalent decimals are just like equivalent fractions. If a decimal goes to the tenths place, then it equals a fraction out of ten; for example, 0.3 is the same as 3/10. Likewise, if a decimal goes to the hundredths place, then the decimal equals a fraction out of 100; for example, 0.15 is the same as 15/100. Fractions like 7/10 and 70/100 are equivalent because 70/100 can be simplified down to 7/10. The same rule applies for decimals; 0.7 and 0.70 are equivalent because they translate into fractions that are equal.

Continue Reading

What are the advantages and disadvantages of the parametric test of significance in statistics?

Surender Komera writes that other disadvantages of parametric tests include the fact that they are not valid on very small data sets; the requirement that the populations under study have the same variance; and the need for the variables being tested to at least be measured in an interval scale.\nChong-Ho Yu states that one rarely considered advantage of parametric tests is that they don't require the data to be converted to a rank-order format. Conversion to a rank-order format in order to apply a non-parametric test causes a loss of precision. Another advantage is that it is much easier..

Continue Reading
Showing 1551 to 1560 of 3956 (396 Pages)