✏️ Rotations are isometries On ℝ², the rotation by angle θ is given by String.rawR_θ = (θ -θ \ θ θ) Check: R_θᵀ R_θ = I (using ²θ + ²θ = 1), confirming this is an isometry. 🔗 magicinternetmath.com 🏴‍☠️ Subscribe to the Pioneers Club ⚡ fundamentals@zeuspay.com #math #bitcoin #education