the ancient greeks, the system was probably designed by more than one person
A protractor.
A regular hexagon has 6 equal interior obtuse angles each measuring 120 degrees
A triangle has three angles, not "angels." The sum of the angles will equal one hundred eighty degree. An equilateral triangle has three equal angles all measuring sixty degrees.
The inventor is not known.
There was no individual inventor.
A protractor.
A simple answer is impossible: it is a brochure ! Read a book of metrology.
The inventor is assumed to be the German engineer Dietrich Uhlhorn; he used it for measuring the speed of machines in 1817.
A regular hexagon has 6 equal interior obtuse angles each measuring 120 degrees
All 4 angles of a rectangle are congruent each measuring 90 degrees
360 - (60 + 45 + 100) = 155
A triangle has three angles, not "angels." The sum of the angles will equal one hundred eighty degree. An equilateral triangle has three equal angles all measuring sixty degrees.
who is the inventor
Inventor
an accidental inventor is a inventor that always makes accidents
an inventor is a designer but a designer is not an inventor
There is no headache inventor.