explains universe🌐 on Instagram: "This timeless geometry illusion uses wooden spheres stacked like billiard balls to trick the eye. A triangle made of 15 balls arranged in five rows has one ball removed, leaving 14. When these are repositioned, they appear to form a perfect four-row triangle, yet four balls are somehow left over. It feels like a ball vanished—but nothing actually disappears. The secret lies in spacing and packing. The larger triangle has tiny gaps created by hand placement, whi

Triangle Congruence Theorems, Two Column Proofs, SSS, SAS, ASA, AAS Postulates, Geometry Problems