A pair of dividers.
There is exactly one line that can pass through two distinct points. This line is uniquely determined by the two points.
lengthThe distance between two points is called the displacement.
collinear
line
hygrometer psychrometer
a calibrated instrument for measuring the potential difference between two points.
Chordophone
string instruments
Chordophone
A compass.
An extremely accurate device used as an instrument for measuring the distance between two points. Often used in machining.
A musical instrument which produces sound by vibrating strings stretched between two fixed points is a chordophoneinstrument.
A voltmeter is the instrument that measures electric potential. It is typically connected in parallel to the circuit or component being measured to determine the voltage difference between two points.
Cardinal points most commonly refers to the points north, south, east and west as shown on a compass. A compass is an instrument that uses the magnetic force of the earth to determine which direction is north.
if two points have the same points then they make a vertex.
You must be talking about a compass, a directional tool.
The simply hold the instrument in a position that is comfortable to them. Each person is an individual.