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 More on lampshades from a cone 2019-12-14 From Guy:from an earlier post re; lampshade from a cone Being math ignorant I cannot figure out how this equation makes sense $\frac{2\pi \times 33 - 2\pi \times 20}{2\pi \times 33} = \frac{13}{33}$ imagine these as fractions multiplied by 360 to calculate a section of a circle to form a cone ThxAnswered by Penny Nom. A lamp shade 2012-05-15 From Fleur:I am helping my child make a cone lampshade, the measurements are as follows in "cm's" 21 cm = height 8 cm = top diametre 40 cm = bottom diametre Please could you give the pattern (cut out) dimensions for final cut.Answered by Penny Nom.

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