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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 a geometric shape?

A: The term "geometric shape" refers to any shape that remains virtually unchanged if it is moved around, flipped or reflected off of a surface. When manipula... Full Answer >Filed Under: -
Q:
## What is center of dilation in mathematics?

A: In mathematics, the term "center of dilation" refers to a constant point on a surface from which all other points are either enlarged or compressed. The ce... Full Answer >Filed Under: -
Q:
## 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: -
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: