Two years ago in our MacStories Weekly newsletter for Club MacStories members, I shared a shortcut that enabled creating wallpapers for iPhone and iPad featuring solid colors or gradients of your ...

You need both a point and the gradient to find its equation. You are usually given the point - it's where the tangent meets the circle. To find the gradient use the fact that the tangent is ...

The gradient of ... of the area of a circle. Both can be calculated using the angle at the centre and the diameter or radius. Calculating the volume of a standard solid The volumes of standard ...