The ruler, meter stick, yard stick, and tape measure have been used
for hundreds of years, with stunningly excellent reliability.
A measuring tape should work well in most cases.
Some of the devices used to measure angle are Transit, Protractor and Compass.
A tape measure is commonly used to measure the width and length of a sidewalk. It is important to ensure accurate measurements when planning for repairs or construction work on sidewalks.
A ruler or a caliper could be used to measure the dimensions of a cube of sugar, such as its length, width, and height. Alternatively, a volumetric measuring tool like a graduated cylinder or beaker could be used to measure the volume of the cube by submerging it in water and measuring the displacement.
measure it
The way you can work out the length of a triangle is if you are given the height and the area of that triangle ( this works of you don't want to measure it) or you could just measure it.
An instrument is an object used for work in science or the arts.
An anemometer is a weather instrument used to measure wind direction and speed. A simple anemometer does just that but its wind speed is manually measured.
Because they have to measure length of hair to cut
A moisture meter is commonly used to measure the moisture content of various materials like wood, soil, or grain. These meters work by calculating the electrical conductivity or resistance of the material to determine its moisture level accurately.
Astral navigation. By using a sextant (instrument used to measure the altitude of a celestial object) a clock and logarithms you can work out your position on the earth's surface hence 'sailing by the stars'
A meter rule is a measuring instrument typically used in science and engineering to measure length or distance in metric units. It is a long, flat, rectangular ruler usually one meter in length, with markings in centimeters and millimeters along its edge. The meter rule is a precise tool that allows for accurate measurements to be taken in various applications, such as physics experiments, construction projects, and laboratory work.