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USING THE 3-4-5

USING THE 3-4-5. TIM CASSELL MGF 1107 PROFESSOR LEO LUSK. WHAT IS THE 3-4-5?. It is a process that most people in the construction industry use to check for “square”. It is a simple form of the Pythagorean Theorem. HOW DO YOU USE THE IT?.

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USING THE 3-4-5

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  1. USING THE 3-4-5 TIM CASSELL MGF 1107 PROFESSOR LEO LUSK

  2. WHAT IS THE 3-4-5? • It is a process that most people in the construction industry use to check for “square”. • It is a simple form of the Pythagorean Theorem

  3. HOW DO YOU USE THE IT? • From the corner of a square or rectangle you measure in both directions. • One direction you measure three feet and make a small, accurate mark. • The other direction you measure four feet and make another small mark. • Now measure the distance between the two marks you made. If it is square, it will read exactly five feet.

  4. WHAT CAN YOU USE IT FOR? • It can be used to make sure a deck you are building is square to the house. • If you are pouring concrete and need to make sure the forms are right you can use this formula. • You can even check existing work for errors.

  5. WHAT IF I GET 3-4-5 1/2? • If the last measurement you make(the five foot one) is not right, you can adjust it by moving the wall (or whatever) until the five foot mark is reached.

  6. ABOUT THE AUTHOR • Tim Cassell • Professional Student • Amateur Deck Builder • Father of Almost Three • Elementary Education Major

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