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If you are looking for the angle of elevation from the ground to the top of Qutub Minar, here is a solution. Qutub Minar is 72.5 meters tall. The angle of elevation would equal arctan(72.5/5). It comes out to approximately 86.05 degrees.
If you position the protractor with the center on the vertex while one of the rays is pointing at 0°, the other ray is pointing at the number representing the magnitude of the angle in degrees.
21metres
Use the tangent angle of elevation which works out as 31.7497 degrees to four decimal places
The question is not quite clear but if the angle of elevation is 26 degrees at a distance of 165 feet away from the building then its height is 80.47587711 feet. 165*tan(26) = 80.47587711 feet