noun1. ASTRONOMY
a prominent pattern or group of stars, typically having a popular name but smaller than a constellation.
2. a group of three asterisks (⁂) drawing attention to following text.
Also used as Therefore in mathematics.
Category: Mathematics
Mathematics uses many concepts in threes. The first structure mathematically is a triangle. There are acute, right, and obtuse angles. Trigonometry is the study of the relationship of the sides of a triangle. Have your heard of Pascal's Triangle?
The Rule of Three in Mathematics
The Rule of Three is a Mathematical Rule that allows you to solve problems based on proportions. By having three numbers: a, b, c, such that, ( a / b = c / x), (i.e., a: b :: c: x ) you can calculate the unknown number. The Rule of Three Calculator uses the Rule of Three method to calculate the unknown value immediately based on the proportion between two numbers and the third number.
The working of the Rule of Three Calculator can be expressed as follows:
Here, there are two values: A and B and a value of X. In order to find out the value of Y, the Rule of Three tells me that B is related to A and that Y is related to X.
How does the Rule of Three Calculator work?
Simply fill in the fields of the Maths Calculator with the values you want to work out (Value A, Value B and Value X), press the calculate button and the Rule of Three Calculator will immediately display the missing value of Y.
An example of the Rule of Three:
An example that you would use to explain the rule of three is as follows:
If I have 8 litres of paint for 2 bedrooms, how many litres of paint would I need for 5 bedrooms?
In this case, the two values of A and B are known, A) 2 bedrooms and B) 8 litres. The value of X is also known ( 5 bedrooms) and the missing value is that of Y ( the number of litres) So:
Math is racist: How data is driving inequality
By Aimee Rawlins September 06, 2016 17:24PM ED
These “WMDs,” as she calls them, have three key features: They are opaque, scalable and unfair.
It’s no surprise that inequality in the U.S. is on the rise. But what you might not know is that math is partly to blame.
In a new book, “Weapons of Math Destruction,” Cathy O’Neil details all the ways that math is essentially being used for evil (my word, not hers).
From targeted advertising and insurance to education and policing, O’Neil looks at how algorithms and big data are targeting the poor, reinforcing racism and amplifying inequality.
Continue reading Math is racist: How data is driving inequality
