Tailor’s tape and electronic calculator: what they have in common

1. Step 1. Tailor’s tape — uses — Euclidean geometry. A scale is marked on the tape.
2. Step 2. Euclidean geometry — is used in — Shukhov Tower. The hyperboloid is assembled from straight bars.
3. Step 3. Shukhov Tower — has part — Antenna. A radio tower.
4. Step 4. Antenna — is part of — Pager. It receives the signal with an antenna.
5. Step 5. Pager — has part — Liquid-crystal display. The message appears on an LCD.
6. Step 6. Liquid-crystal display — is part of — Electronic calculator. An LCD display.

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