Distance and displacement vector illustration scheme. Route shortest length measurement method. Geometrical calculation with two paths and destination points example. Educational explanation drawing.
Trigonometry cosinus, sinus and tangents example diagram. Triangle side length and angles proportion related to the circle. Labeled school study guide drawing with simple, colored lines.
Convex and concave lens, vector illustration diagrams. Labeled scheme with light ray direction and bending through lens. Controlling focal length and focus point for optometry equipment.