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Mark out Major axis A-B, and Minor axis D-E.
Mark and insert pins at P1 and P2,
from C on either side.
Insert pin at E.
Tie string firmly around these 3 pins.
Remove pin at E, insert pencil inside string loop
and with string pulled taut, rotate pencil to draw the oval.
C to P1 and P2 = Total String Length = Area m² Minor Axis |
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