How to make a rectangle out of cardboard

Date: 15.10.2018, 13:04 / View: 74171
Old 12-01-2011, 02:53 PM # 10

Jojo-arch

Member

Join Date: Sep 2011

Posts: 166 Rewards Points: 150 Default The 3: 4: 5 thing.
It’s 90º, there are two operative theorems.
of the two sides of the squares of the two sides of the hypotenuse. (For sides of different lengths to 3: 4: 5) 3 & 4 are adjacent sides and 5 the hypotenuse. 3² + 4² = 5²
this is the right angle for the triangle is always formed.
In feet or meters Multiples of 1 Ratios 3: 4: 5 Formula 3² + 4² = 5² Multiples of 2 Ratios 6: 8: 10 Formula 6² + 8² = 10² Multiples of 3 Ratios 9:12:15 Formula 9² + 12² = 15² Multiples of 4 Ratios 12:16:20 Formula 12² + 16² = 20² < Span> Multiples of 5 Ratios 15:20:25 Formula 15² + 20² = 25² Multiples of 6 Ratios 18:24:30 Formula 18² + 24² = 30² Multiples of 7 Ratios 21:28:35 Formula 21² + 28² = 35² Multiples of 8 Ratios 24:32:40 Formula 24² + 32² = 40² And so on To apply the formula, hammer a sharpened peg 2 ???? x2 ???? in one corner then a hammer in the center. This will be peg A Using a 100 ?? 0 ???? The tape is a hook. Leave it on the ground. 0 ???? mark, hammer another peg as in 1, above. This will be a peg. It’s 90 ° to the baseline, on the ground. walk (with the first tape) diagonally towards the 15? 0 ???? mark on the second tape. Cross the tapes. Pick up both tapes. With the tape from the tape (second tape) at 15 ?? 0 ???? the pe first 25 25 25 25 25 25 ???? 25 0 ???? stret stret A, B, C, A, A, A, A, A, A, A, A, A, A, A, A E. (Pegs B & C, from A) There is no need for more information. Hook the diagonal tape on the peg A (mirror image of the first tape) and where the tapes are the cross. (for a 20 ?? x40 ?? rink, the diagonal is 44.72 ??). Check both diagonals. If you have a perfect rectangle, you can’t make it a little bit longer than 5 minutes. Cheers from Joe in Oz. JoJo-Arch is offline  Reply With Quote


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