It's nearly impossible to describe length without getting you to pick up something around you (as screen sizes vary the sizes of lines that could be created through computer). If you have a 15cm ruler or even a 30cm ruler, look at 14 and 7/10 centimeter mark to 0. That's how long 147mm is. Otherwise, pick up a fullsize pencil. That's approx 14.7cm
a straight line
A curved line is a line that is curved.
A linear line is a straight line
a line across
Because LED torches support many types of batteries, such as 18650, CR123, AA, AAA, 14500, 16340, 10440, etc. The lengths of legs is around 147mm if by 18650 battery. Such as IMALENT EU06 is 147mm length.
If the line has ends, then it's a line segment.
The plumb line is a vertical straight line.
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a line
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a line graph looks like a stocks chart