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# What Does "complementary" Mean in Math?

"Complementary" is a mathematical term used to define the amount one must add to something to make it "whole." For instance, the complement of an event A is the set of all outcomes in the sample space that are not included in the actual outcomes of event A.

Continue ReadingThe term complementary can be used in reference to different aspects of mathematics. With angles, the complement is the addition of two acute angles to equal 90 degrees. In probability, the complement of an event is all outcomes that are not the event itself. For example, when flipping a coin, if the actual event is "heads," then the complement is "tails." In probability mathematics, the combined event and complement make all possible outcomes.

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Q:
## What Is the Difference Between Parallels and Meridians?

A: Parallel is an alternate term for a line of latitude on a map, while meridian is an alternate term for a line of longitude. Lines of latitude are located p... Full Answer >Filed Under: -
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## What Is a 3D Pentagon Shape Called?

A: One term used for a 3D pentagon is a shape called a pentagonal prism. According to Reference.com, this is the polygon that results when you take a pentagon... Full Answer >Filed Under: -
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## What Is the Definition of "hypotenuse"?

A: In geometry, the term "hypotenuse" refers to the side of a right triangle that is opposite the right angle, which is also the longest side. Geometric and t... Full Answer >Filed Under: -
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## What Is the Definition of "equiradical"?

A: The term "Equiradical" means "equally radical" and is used in mathematics to describe roots of the same nth. For instance, the square root of 7 and the squ... Full Answer >Filed Under: