Axis perpendicular to H.P ( square of pyramid) 1.problem
41:56
Parallel and Perpendicular Lines, Transversals, Alternate Interior Angles, Alternate Exterior Angles
21:21
projection of solids (square of the pyramid) projection of solids in square pyramid
31:51
Visualizing quaternions (4d numbers) with stereographic projection
21:40
Same perimeter, different areas: Which is the largest? The Isoperimetric Problem
27:35
Axis inclined to both H.P and V.P(square prism)
21:56
인물수채화 Watercolor portrait painting
26:12
How to Remember Everything You Read
20:47