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If it measures 90 degrees, then it is called a right angle.
Measures of the center.
a ray
It is an obtuse angle
The gun that measures angles are called "clinometers". We used them in Geography and maths as well! :)
Otologist. Normally they are specialized in the ear, nose and throat (ENT), thus called an Otorhinolaryngologist. Audiologist specialize exclusively in hearing problems - they examine, screen, diagnose, treat, and provide hearing aids or cochlear implants.
The doctor is an "ENT" (ear, nose, and throat doc) or an "Otolaryngologist". His technician/grunt/slave who runs the hearing test is an Audiologist.
Someone who isn't deaf is typically referred to as hearing, or as having normal hearing.
A surveyor is a professional who measures the elevation of the Earth's surface and places plaques known as benchmarks. These benchmarks serve as reference points for future measurements and construction projects.
An audiogram is a record of hearing. It is what laypeople call a hearing test.
Until a professional improves this answer, here is a layman's understanding. Radiation can be measured with a Geiger Counter, or a film badge device I think is called a Dosimeter.
a persons shoe sise is....
Professional negligence called MALPRACTICES.
The answer to country persons (us) is hayseeds
Changes in bone thickness are called osteoporosis, changes in vision are called presbyopia, and changes in hearing are called presbycusis.
a professional dancer.
The preliminary hearing