12 Pyramid has square base congruent edges and and Let be the measure of the dihedral angle formed by faces and Given that where and are integers, find
12 Tumaas ay parisukat na batayang kapareho gilid at at Hayaan ang panukalang-batas ng dihedral anggulo nabuo sa pamamagitan ng mga mukha at Dahil na saan at ay integers, hanapin