Question 1

How do I work out the floor area of a room that is not rectangular?

Accepted Answer

Split it into rectangles and triangles, calculate each one, and add them together. An L-shaped room is two rectangles; a room with an angled corner is a rectangle plus a triangle.

Question 2

What is a mu?

Accepted Answer

A mu (亩) is the traditional Chinese unit of land area, equal to about 666.67 square metres or roughly one sixth of an acre. It is still the standard unit in Chinese property and farmland listings.

Question 3

Why show several units at once?

Accepted Answer

Because the answer is usually needed in a different unit from the input. Flooring is priced per square metre in most of the world and per square foot in the US, and land is sold in mu or acres.