棱长a正方体,表面积 6a^2,体积 a^3;
球体直径D,表面积 πD^2;体积 πD^3/6;
令:6a^2 = πD^2,a^2 :D^2 = π :6
a :D = √π :√6
D = a√(6/π)
正方形体积:球体积=a^3:πD^3/6
=a^3:π(a√(6/π))^3/6
=1:π(√(6/π))^3/6 ≈ 1.382
棱长a正方体,表面积 6a^2,体积 a^3;
球体直径D,表面积 πD^2;体积 πD^3/6;
令:6a^2 = πD^2,a^2 :D^2 = π :6
a :D = √π :√6
D = a√(6/π)
正方形体积:球体积=a^3:πD^3/6
=a^3:π(a√(6/π))^3/6
=1:π(√(6/π))^3/6 ≈ 1.382