lean_workbook_plus_10986

Proved

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

Find the distance between points A and B with coordinates ( $a_1$ , $a_2$ ) and ( $b_1$ , $b_2$ ).

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_10986 (a₁ a₂ b₁ b₂ : ℝ) : ∃ d, d = Real.sqrt ((a₁ - b₁) ^ 2 + (a₂ - b₂) ^ 2)   :=  by sorry

Source