Interactive Area of a Circle: Click and drag points to explore Area, radius.
area of circle through triangle demo

Interactive Area of a circle

Radius, Area and Circumference

Explore and discover the relationship between area, radius and graph of a circle. . Just click and drag the points.
Radical Form?
$$ Area = \pi \cdot radius^2 $$
$$ $$

Ultimate Math Solver (Free)

Free Algebra Solver ... type anything in there!