How do you find the area of a sector of a circle? Use the formula of course. Then all you have to do is plug in the given values and do the math. Make sure you are following the rules of order of operation. The instructor will walk you...

This video defines rational numbers. Through the definition and examples, learners should comprehend that irrational numbers are numbers that cannot become simple fractions. The video uses examples of very common irrational numbers, such...

The formula for the volume of a sphere is volume equals four-thirds pi times the radius cubed. That's a mouth-full. But if you are given the radius value of the sphere, all you have to do is plug it in and do the arithmetic. Just...

What do a basketball, a bowling ball, and a ping pong ball all have in common? They are spheres. So how do you measure the surface area of a sphere? Yes, there is a formula and all you have to do is know one measurement of the sphere to...

Video first reviews what natural numbers, whole numbers, integers, rational numbers, irrational numbers and real numbers are. Gives examples of classifying numbers. [5:17]

This resource explains how to find the square root of real numbers using their prime factorizations and labeling the results as rational or irrational. [10:19]

A celebration of March 14, or 3.14, which is Pi Day. People on the street are questioned about their knowledge of pi, and we see how the Exploratorium in New York observes this special mathematics day. Aired Mar. 14, 2008 [17:50]

Take a look at this tutorial to learn about the irrational number pi. [4:41]

This resource explains how to find the square root of real numbers using their prime factorizations and labeling the results as rational or irrational. [10:19]