Are you looking for some tough math problems to practice before your next exam? Well, you've come to the right place. Math riddles are great because they require students to apply their knowledge in ...

The radius of a circle or a sphere is the distance between the center and the edge. The radius can be used to calculate a circle's diameter, area and circumference. Likewise, a sphere's volume is ...

Perimeter is the distance around the outside of a shape. Farmer John's Pet Farm is getting new fencing and turf for each of the animal enclosures. Have a look at the picture and work out the perimeter ...

MATHEWS, G. A Triangle that gives the Area and Circumference of any Circle, and the Diameter of a Circle equal in Area to any given Square. Nature 93, 110 (1914 ...