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Is a square a rhombus?

Without a specific exclusion, a square qualifies not just as a rhombus but also as a specific type of rectangle, since it is a four-sided figure with four congruent, 90-degree angles. In fact, squares, rectangles and rhombuses can all be considered specific types of parallelograms. However, even if all squares are rhombuses, not all rhombuses are squares.

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What are some popular geometry calculators?

For example, the Pythagorean Theorem calculator found on Basic-Mathematics.com computes the hypotenuse, or longest side, of a right triangle when the user enters values for the shorter two sides. The site uses the a2 + b2 = c2 formula known as the Pythagorean formula to solve for “c” when values are entered for “a” and “b”. The site also features a calculator that determines the circumference of a circle when the radius is input.\nOther calculators are available to help solve problems such as determining the area of a rectangle or the volume of a cylinder, to name a few. Calculator..

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What is "XIII" in Arabic numerals?

In Roman numerals, "I" equals "1" while "X" equals "10." If the smaller unit is after the bigger unit, the smaller unit is added to the bigger unit, as with "XIII"; essentially, it is "10" plus three "1s." If the smaller unit is before the bigger unit, it is subtracted from the number. For instance, the Roman numeral "IX" is nine, because it "10" minus the number before it, "1." Other common units are "V," which is "five," "L," which is "50," and "C," which is "100."

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What is disjoint probability?

Mathematicians illustrate the principles of disjoint probability with the equation P(A and B) = 0, with P representing probability and A and B representing two disjoint events. In this equation, the probability of A and B occurring is zero. The probability of A or B occurring in disjoint events is simply the sum of the probability of A and B.\nThis principle is clear in the example with the driver approaching an intersection. The probability of the driver turning left, turning right or going straight is one-third for each case, but the probability of turning left or right is two-thirds, which ..

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What is a percent?

A percent is a way of counting part of a total and is comparable to a fraction or decimal. Fifty percent is the same as one half or 0.5. Percentages are often used to show an increase or decrease in value or to quantify a change in value over a period of time. As percentages use a common baseline, they are useful when comparing data with different totals or of a different size.

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What is 5/12 as a decimal?

About.com demonstrates that to change a fraction into a decimal form, it is necessary to divide the top number (the numerator) by the bottom number (the denominator). In this case, the solution to five divided by 12 does not end but goes on infinitely repeating the last digit. In the case of 3/12, however, there are no repeating numbers, and the answer is simply 0.25.

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What is a concave polygon?

Math Open Reference indicates that a concave polygon looks like a vertex that is pushed in toward the inside of the figure. One of the characteristics of a concave polygon is that some of its diagonals lie outside the polygon's interior space. Moreover, the area of a concave polygon can be calculated by using the same method of computing for the area of any other irregular polygons.

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What is the next number in the series 38 36 30 28 22?

The first term of the series is 38, and all subsequent numbers have a difference of two or six. The series is decreasing and not increasing. The last number is 22, and the number before 22 is 28. The difference between them is six. Hence, the next number should have a difference of two. The equation 22 - 2 = 20 provides the next number in the given series of numbers.

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What is single variable calculus?

Single variable calculus can be used in calculating arc length, surface area, work, energy and force. While differentiation and integration are the main functions covered in single variable calculus, it also makes heavy use of limits, continuity, sequences, series, complex numbers and differential equations. Studies of differentiation cover rules for solving the equation, such as the product, quotient and chain rules. Techniques on integration used in single variable calculus include trigonometric substitution and partial fraction decomposition.

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How do you convert a percent to a fraction?

Place the number over 100No matter what percent is given, place the percent in the numerator (top) of the fraction. Draw the fraction line under the percent number. Place 100 below the line as the denominator of the fraction.Make sure all numbers are integersTo be a proper fraction, neither the numerator nor the denominator can contain a decimal. If the percent contained one decimal place, for example 1.5 percent, multiply the top and bottom of the new fraction by 10. If the percent contains more than one decimal, add as many zeros to the end of ten as there are decimal places. The example 1.2..

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