અવનતકોણ અને ઉન્નતકોણની આકૃતિ
<a href="//commons.wikimedia.org/w/index.php?title=User:Eternalbabybear&amp;action=edit&amp;redlink=1" class="new" title="User:Eternalbabybear (page does not exist)">Eternalbabybear</a>
2019-12-21
<a href="//commons.wikimedia.org/wiki/File:Angle_of_elevation_and_angle_of_depression.svg" title="File:Angle of elevation and angle of depression.svg">File:Angle of elevation and angle of depression.svg</a>