The Sphere Generator draws a sphere with a circle round its middle, its back half dashed, and the radius drawn from the center to the edge, or the diameter right across. It also draws a hemisphere, with its flat face down like a dome or up like a bowl.
Teachers use it for volume and surface area questions on spheres and hemispheres, such as how much a bowl holds or how much paint covers a dome. Label the radius or diameter with its number and unit, with text like r, or nothing.
Copy the figure straight into a test, worksheet or slide, or download it as a PNG or SVG. Printing the page prints just the figure. Share link copies the page’s address with your settings in it, so anyone who opens it sees this exact figure, and presets save settings you use often in your browser. It’s free, with no sign-up.
Under Draw, choose A hemisphere. Under Position, choose whether its flat face is down, like a dome, or up, like a bowl.
Yes. Tick Give the diameter instead and type the diameter. It is drawn right across the sphere through its center.
The circle round the sphere’s middle is drawn like an ellipse seen from a little above, and its back half, which you couldn’t see through the front, is dashed. Turn off Hidden edges under Lines to leave it off.
Math Figures Sphere Generator