Calipers are used to measure the dimension of anarticle. In measuring a section of pipe you would use an inside caliper to give the internal diameter, and an outside caliper to give the external diameter. The difference being the thickness of the pipe wall.
A protractor can be used to measure an angle.
Varier calliper
The instrument you are looking for is a compass
The instrument used to measure a angle is called a protractor!
A set of calipers.
Vernier caliper
Inside and outside calipers are used for this.
A manometer instrument is used to check the alignment of two shafts.
The instrument used to measure the diameter of spherical objects is called calipers.
A Vernier caliper, or a micrometer can measure diameter real well, and from that it's easy to calculate area.
A vernier caliper or a micrometer can be used to measure the internal diameter of a beaker. These tools provide accurate measurements of dimensions, including internal diameters, with precision.
Astronomers use a variety of instruments such as telescopes and radar to measure the diameter of planets. One commonly used instrument is a laser range finder, which can be used to determine the size of a planet by measuring the time it takes for a laser beam to bounce back to Earth after being pointed at the planet's surface.
Calipers are used to measure the dimension of anarticle. In measuring a section of pipe you would use an inside caliper to give the internal diameter, and an outside caliper to give the external diameter. The difference being the thickness of the pipe wall.
A micrometer or caliper can be used to measure the diameter of a test tube accurately. These tools provide precise measurements by directly reading the diameter of the test tube in millimeters.
Relative roughness is a measure of the surface roughness of pipe surfaces. It is the size of the roughness scaled by the diameter of the pipe or duct. Rel Roughness=e/D; where e is the measurement of the surface roughness and D is the diameter of the pipe. It is mainly used for calculating head losses in piping systems.
venturimeter, orificemeter are some of the instruments used to measure the flow rate in pipe.