diff --git a/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/20.overview/cylindrical_coordinates_orthogonal_base_L1200.jpg b/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/20.overview/cylindrical_coordinates_orthogonal_base_L1200.jpg new file mode 100644 index 000000000..a11c61367 Binary files /dev/null and b/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/20.overview/cylindrical_coordinates_orthogonal_base_L1200.jpg differ