I am looking at a 5 foot by 5 foot square and I was told to find the diameter of the square? Can anyone help me solve this problem?

# Tag: diameter

## How is the diameter of a non-circular (effective) aperture actually measured?

An f-number is determined as the ratio of the focal length to the diameter of the entrance pupil. But the actual aperture diaphragm is usually not a perfect circle. Its shape is determined by the number of diaphragm blades and their edge (curved or straight). Depending on those the aperture might be a pentagon, hexagon, octagon… and with straight or curved edges. So how is the diameter actually determined? Is it for example twice the distance between the center and the widest point at an intersection of the blades? Twice the distance between the center and the nearest point on an edge?

## How to find the vole of a cube remaining after drilling a cylinder with a diameter larger than the cube’s side length?

So, for example, say there’s a cube with side length L, and you drill a cylinder with a diameter larger than L through the cube, what volume remains?