Pi Mu Epsilon Journal, Vol. 13, No. 10, 1914 CENTENNIAL ISSUE 2 2014 (Spring 2014), pp. 637-643 (7 pages) Lester Ford introduced Ford Circles in 1938 in order to geometrically understand the ...

In other words, there are numbers that cannot be represented as the ratio of two integer values. For example, if the right angle forming sides a = 1, then the hypotenuse c = √2.

A new curriculum to introduce rational numbers was devised, using developmental theory as a guide. The 1st topic in the curriculum was percent in a linear-measurement context, in which halving as a ...