square graph

diagonal length | sqrt(2) s≈1.41421 s area | s^2 perimeter | 4 s central angle | 90° = π/2 rad≈1.571 rad interior angle | 90° = π/2 rad≈1.571 rad interior angle sum | 360° = 2 π rad≈6.283 rad apothem | s/2 = 0.5 s (assuming center (x_0, y_0) and edge length s)