Move the sun! Adjust the sextant to move the image of the sun to the middle of the image of the horizon. The red angle is the angle of elevation, this angle is two times the angle of adjustment.
Trisecting a Rectangular Prism (Improved)
Rhombuses, Rectangles, & Squares
Dynamic Boxplot v2.1
Relation between angle formed by a transversal with two parallel line by:- R.P.Pandey
Difference and Slope
Solids or 3D Shapes