A,b,c are variables. They usually refer to the sides of a triangle, but also can mean just normal variables.
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Two intervals (a, b) and (c, d) are said to be equal if b - a = d - c.
The associative property states that the result of an addition or multiplication sentence will be the same no matter the grouping of the terms. Associative: (a + b) + c = a + (b + c) (a × b) × c = a × (b × c)
A+b+c=c+b+a
Two ratios a:b and c:d are equivalent when a*d = b*c. (Usually you can say when a/b=c/d except when b or d is 0.)
associative property example: (a+b)+c = a+(b+c)