Answer:
Circumference being the distance around a circle, can be applied to any life cycle. ... At school we used a Venn Diagram which is two intersecting circles. Venn diagrams were invented by a guy John Venn as a way of picturing relationships between different groups of things.
One polynomial identity that crops up often in various areas is the difference of squares identity:
A2-b2=(a-b) (a+b)
We meet this in the context of rationalising denominators.
5x15, 3x25 because 30+45=75 and both 5x15 and 3x25 equal 75
