A Common Ratio
Compare the ratio of the circumference (C) and the diameter (d) of several circles.
Author Archive for: corrill
Entries by InterMath
Rationalize Pi
Approximate pi with a rational number.
N-Sided Circle?
Compare the perimeters of polygons to the circumference of a circle.
Wrapping Around the World
How much string is needed to wrap around the world?
Walking Around the World
Compare the distance a man’s head travels to the distance his feet travel when he walks around the world.
Surface Area
Relate the surface area of a sphere to the area of a circle.
Surrounding Squares
Find a method that will construct a square that has the same area as the area of a given circle.
Circle Inscribed in a Semicircle
Compare attributes of a circle that is inscribed in a semicircle to attributes of that semicircle.
Segment Areas
Determine the measure of the central angle of a circle that will make the shaded region’s area 1/ 4 of the entire circle’s area.
Dividing Pizza
Compare slices of pizza from pizzas with different diameters.