triquetrum.
There are special angle-measuring instruments which you can use to measure the angle.
The Ancient Greeks attempted to measure the relative distances to the moon and the sun. Notably, the Greek philosopher Aristarchus proposed a method for determining the distance to the moon based on the angle between the sun and the moon during a half-moon phase.
Quadrants and sextants are still used but to a much lesser degree since the introduction of electronic instruments and satellite GPS systems were introduced. Quadrants/sextants are instruments used to measure angles in surveying and navigation. Using trigonometry when surveying, measuring an angle and knowing the length of a side and another angle of a triangle other distances and angles can be calculated. In navigation, measuring the angle of a star from the horizon and using a set of tables and an accurate time piece your position can be calculated.
the measure of an angle is the degrees of an angle.
Accuracy of readings of e.g. meters and certain optical instruments. Parallax is also used in astronomy for calculating distances to(astronmically)far-away objects.
you can measure a angle with a protracte.
they both measure the angle in degrees
The measure of the obtuse angle would then be double that of the acute angle.
The parallax angle of such distant objects is way too small to be measured. In general, the farther away an object, the smaller is its parallax angle.
The measure of the exterior angle.
No cheating!
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