Most people measure the penis when it is erect because temperature and emotion can effect the length of a flaccid (soft, limp or unerect) penis. Usually a rule (or ruler if you wish) is placed along the upper side of the penis with one end of the rule/ruler touching the pubic area and the measurement at the tip of the penis is then read off on the rule/ruler.
the measure of a straight-line distance between two points is called length.
The best way to find out if 2 points have equal elevation is to measure them. You must measure each of these points.
To measure an angle you must take all the points in between the two. Therefor it could be anywhere from 2 to 100 points.
You should use a special device for measuring angles - a protractor. With a ruler, it is much more complicated, but still possible: you can mark two points on the angle, one on each side; measure the distance from the vertext of the angle to those points; measure the distance between the points; then use the Law of Cosines to calculate the angle.
To measure the wavelength of a wave, you can use the distance between two consecutive crests or troughs. This distance is known as the peak-to-peak distance or trough-to-trough distance. Another option is to measure the distance between two points that are in phase with each other, such as two neighboring points where the wave is at its peak or trough simultaneously.
It allows you to measure distances between two points.
distance is the measure of the length between two points where as displacement is the shortest distance between the points.
Measure the distance between the two end points!
By using the distance formula between two coordinated points
One measure of distance between them.
A voltmeter is used to measure the difference in electric potential ("voltage") between two points, usually but not necessarily in an electrical circuit..
A ruler or tape measure can be very useful.