A sextant.
Your missing the angle of elevation or depression.
9.3
The angle of depression is looking at an object below your line of sight.
An angle that measures 210 degrees is a reflex angle.
A right angle measures 90 degrees
Angle of elevation is looking upwards to an object and angle of depression is looking downwards to an object
There's the protractor, a bevel gauge, and the plain ol' measuring tape with pen and paper.Inclinometer.
It is the alternate angle to the angle of elevation
The angle of depression is the same as the angle of elevation because they are alternate angle so use the tangent ratio:- 10*tan(25) = 4.663076582 or 4.663 yards to 3 decimal places
Protractors
The instrument used for measuring slope angles is called an inclinometer or clinometer. An inclinometer typically measures the angle of a slope relative to a horizontal plane, while a clinometer can also be used for measuring angles of elevation or depression. Both tools are essential in fields such as surveying, geology, and construction.
An Abney level is an instrument used for measuring angles of elevation or depression. To use it, hold the device horizontally at eye level and align the sighting tube with the object you wish to measure. Read the angle of elevation or depression indicated on the scale against the bubble level. Ensure to keep the instrument steady for an accurate reading.
you could do a model showing the angle of elevation and angle of depression of a building
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A sextant.the sextonan astrolabe
Some of the devices used to measure angle are Transit, Protractor and Compass.
It can be any object that is above or below the horizontal from the perspective of a viewer.