{"id": "card_works_framing_square", "kind": "verified", "title": "The 3-4-5 the builders use to square a corner", "body": "A triangle with sides 3, 4, 5 is exactly right-angled — 3² + 4² = 5². It is why a knotted rope or a framing square gives a true corner without a protractor.  Worked & sealed by the engine — 3² + 4² = 5² → a true right angle.  [HOLDS; open the seal to re-check.]", "source": {"label": "The Works — worked & sealed", "url": "https://narrowhighway.com/s/aa3f89f2bd9378be920cc301b665a6de98b4b1c0ec234d5cfacd6dd9a878bd1a", "domain": "geometry", "authority_tier": "verified"}, "shelf": "the-works", "box": "engineering", "bands": ["the-works", "engineering", "geometry", "structural", "/", "construction"], "connections": [{"to_card_id": "card_spine_the-works", "relationship": "member_of", "evidence": "a member of the the-works shelf in the keeping"}, {"to_card_id": "card_works_polygon", "relationship": "kindred", "evidence": "A sibling worked demonstration in geometry."}, {"to_card_id": "card_k_floor_of_discovery", "relationship": "paves", "evidence": "A worked, engine-sealed demonstration — a paving-stone of the floor of reality."}, {"to_card_id": "card_v_b7cf152660c4", "relationship": "demonstrates", "evidence": "A worked demonstration in the same field (geometry)."}, {"to_card_id": "card_works_spherical_tank", "relationship": "kindred", "evidence": "A sibling worked demonstration in geometry."}, {"to_card_id": "card_works_concrete", "relationship": "adjacent", "evidence": "Neighbouring worked demonstrations in the same part of the volume."}, {"to_card_id": "card_works_luhn", "relationship": "adjacent", "evidence": "Neighbouring worked demonstrations in the same part of the volume."}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "subject": "Structural / construction", "extra": {"seal_hash": "aa3f89f2bd9378be920cc301b665a6de98b4b1c0ec234d5cfacd6dd9a878bd1a", "cite_url": "https://narrowhighway.com/s/aa3f89f2bd9378be920cc301b665a6de98b4b1c0ec234d5cfacd6dd9a878bd1a", "demonstration_id": "works_framing_square", "verdict": "HOLDS"}, "presentation": {"glyph": "•", "kind_label": "engineering", "by": "The Works — worked & sealed", "authority": "verified", "posted": "", "standing": "", "link": {"url": "https://narrowhighway.com/s/aa3f89f2bd9378be920cc301b665a6de98b4b1c0ec234d5cfacd6dd9a878bd1a", "host": "narrowhighway.com", "provider": "", "titled": "The 3-4-5 the builders use to square a corner", "waybill_line": "", "reach": "", "embed": ""}}, "neighbors": [{"id": "card_spine_the-works", "title": "The Works — sealed, worked demonstrations", "relationship": "on the shelf of", "why": "a member of the the-works shelf in the keeping", "href": "/card/card_spine_the-works", "resolved": true}, {"id": "card_works_polygon", "title": "The angles inside a hexagon", "relationship": "kindred", "why": "A sibling worked demonstration in geometry.", "href": "/card/card_works_polygon", "resolved": true}, {"id": "card_k_floor_of_discovery", "title": "The Floor of Discovery — one floor, and by its design the fear of God", "relationship": "paves", "why": "A worked, engine-sealed demonstration — a paving-stone of the floor of reality.", "href": "/card/card_k_floor_of_discovery", "resolved": true}, {"id": "card_v_b7cf152660c4", "title": "3² + 4² = 5² → a true right angle", "relationship": "demonstrates", "why": "A worked demonstration in the same field (geometry).", "href": "/card/card_v_b7cf152660c4", "resolved": true}, {"id": "card_works_spherical_tank", "title": "Sizing a spherical tank of radius 3", "relationship": "kindred", "why": "A sibling worked demonstration in geometry.", "href": "/card/card_works_spherical_tank", "resolved": true}, {"id": "card_works_concrete", "title": "The concrete for a slab", "relationship": "adjacent", "why": "Neighbouring worked demonstrations in the same part of the volume.", "href": "/card/card_works_concrete", "resolved": true}, {"id": "card_works_luhn", "title": "The check digit that catches a mistyped number", "relationship": "adjacent", "why": "Neighbouring worked demonstrations in the same part of the volume.", "href": "/card/card_works_luhn", "resolved": true}]}