What is 9cm square?

Answer 1

9

Answer 2

A square with side length of 9cm would have an area of 81 square centimeters. This is calculated by multiplying the side length (9cm) by itself to find the area of the square. The unit for area is always squared, so the result is expressed in square centimeters.

Answer 3

This is one of those areas where there is ambiguity.

A 9 cm square is a square whose sides are 9 cm and which therefore has an area of 81 cm2.

But 9 cm2 represents an area of 9 square centimetres. The shape of this area is unspecified.

When written in the above form, the ambiguity is less obvious but in spoken form it is.