2.5 cm looks like about 1 inch on a ruler
You will not be able to see 0.79 of an inch on a US ruler. The best you can hope for is 0.8 inches. On a ruler, an inch is usually divided into 10 or 16 parts - the smaller, unnumbered marks between the inch marks. You can get 32 divisions on tape measures but they are unusual on rulers. Select a part of the ruler in which each inch is divided into 10 parts. Eight of them will make 0.8 inch. You will not be bale to tell the difference between 0.8 inch and 0.79 inches by eye!
14-little longer than a standard ruler. 1/4-about thickness of a pen
On a standard ruler, .35 inches would be located between the 1/4 inch mark and the 3/8 inch mark. It would be closer to the 1/4 inch mark, but not quite reaching the 3/8 inch mark. .35 inches is equivalent to 9 millimeters, so it would be slightly less than halfway between the 1/4 inch and 3/8 inch marks on the ruler.
4.2 inches is about 10.5 cm
where is .39 on a ruler
i inch
2.5 cm looks like about 1 inch on a ruler
A decimeter is 10 centimetres. (1/3 of a 30cm/12 inch ruler)
You look at the markings on its edge.
6mm is approximately a quarter of an inch on a ruler. It is a small measurement, about the width of a pencil lead. It is typically marked as a short line on most rulers.
One fourth of 1 inch. Look at a ruler and divide a half inch in half-that's a quarter inch.
You will not be able to see 0.79 of an inch on a US ruler. The best you can hope for is 0.8 inches. On a ruler, an inch is usually divided into 10 or 16 parts - the smaller, unnumbered marks between the inch marks. You can get 32 divisions on tape measures but they are unusual on rulers. Select a part of the ruler in which each inch is divided into 10 parts. Eight of them will make 0.8 inch. You will not be bale to tell the difference between 0.8 inch and 0.79 inches by eye!
A ruler
4 inches are 10.16 centimeters.
14-little longer than a standard ruler. 1/4-about thickness of a pen
On a standard ruler, each inch is typically divided into 16 equal parts, known as sixteenths of an inch. To represent .35 on a ruler, you would first convert it to a fraction, which is 35/100 or 7/20. This means that .35 is 7/20 of an inch on the ruler, which would be slightly less than halfway between the 5/16 and 6/16 marks.