How to look at a picture in centimeters?

Each pixel represents 1 mm, and 10 pixel represents 10 mm, which is also 1 cm.

One of Lu Ban's inventions is that he can correctly draw a right triangle, also called a class ruler, and can tell craftsmen which sizes are irregular and which ones are unlucky according to the rules of divination (geomantic omen). These rulers were bought today.

The scale on the ruler, each cell represents 1mm, and the cell 10 represents 10mm, which is also 1cm. In life, the length of thumbtacks and screws, the length of keys on the keyboard, the thickness of small transparent glue and the thickness of the cap of Wahaha bottles are all around 1 cm.

The distance of 0- 1 in the picture is one centimeter, which is almost the width of a finger.

In life, the length of thumbtacks and screws, the length of keys on the keyboard, the thickness of small transparent glue and the thickness of the cap of Wahaha bottles are all around 1 cm.

The scale on the ruler, each cell represents 1mm, and the cell 10 represents 10mm, which is also 1cm. In life, the length of thumbtacks and screws, the length of keys on the keyboard, the thickness of small transparent glue and the thickness of the cap of Wahaha bottles are all around 1 cm.