A Simpler Way to Check Geometry Formulas Without Digging Through Notes

  Geometry is one of those subjects where the idea usually makes sense, but the details can get annoying fast. You know you need the area of a triangle, the volume of a cylinder, or the surface area of a sphere, but then you have to stop and remember which formula uses radius, which one uses diameter, and whether the final answer should be in square units or cubic units. That small pause is exactly why I built Geometry Formulas . The site is meant to be a clean reference for common geometry formulas, with examples and calculators that show the work instead of only giving a final answer. It covers the basics students run into all the time: area, perimeter, circumference, volume, surface area, circles, triangles, rectangles, cylinders, cones, spheres, and rectangular prisms. What I wanted was something faster than flipping through a textbook and less cluttered than many calculator sites. If you just need the formula for the area of a circle, it is there. If you need to check a cylind...