lean_workbook_plus_7764

Proved

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

Let the hexagon be $ABCDEF$ with $AB=AF=1,BC=EF=2,CD=DE=3$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_7764 (a b c d e f : ℝ) (hab : a = 1) (hbc : b = 2) (hcd : c = 3) (hde : d = 3) (hef : e = 2) (haf : f = 1) : a + b + c + d + e + f = 12   :=  by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook

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