A Middle-School Math Trick You'll ACTUALLY USE
Vložit
- čas přidán 8. 03. 2023
- Want to know how to check literally ANYTHING for square? From small projects, to houses, to fields, the 3-4-5 squaring trick just plain works. Here I show you not only how to do the 3-4-5 rule but how to figure out what to do next if you are out of square.
www.etsy.com/shop/InspireWood...
PATREON: / inspirewoodcraft
EMAIL: inspirewoodcraft@gmail.com
WEBSITE: www.inspirewoodcraft.com
INSTAGRAM: / inspirewoodcraft
Looking for DOUBLE SIDED PAPER TAPE, DISCOUNTED HIGH-QUALITY PEC COMBINATION SQUARES and overall great savings ALL THE TIME? Shop where I shop! lddy.no/go67
YOU CAN SAVE 10% ON STARBOND CA GLUES AND ACCELERATOR!
Use the code “INSPIRE10” at checkout! www.starbond.com
SAVE 10% ON OLIGHT FLASHLIGHTS, TACTICAL LIGHTS AND HEADLAMPS!
Use the code "INSPIRE10" at checkout! www.olightstore.com/?streamer...
BANGGOOD WOODWORKING TOOLS: www.banggood.com/marketing-Wo...
MY HAND TOOLS, POWER TOOLS, CAMERA GEAR AND MORE:
www.amazon.com/shop/inspirewo...
SOME OTHER VIDEOS YOU MIGHT BE INTERESTED IN:
A NO-NONSENSE WAY TO SHARPEN A CARD SCRAPER:
• The No-Nonsense Way to...
HOW TO MAKE THIN STRIPS ON THE TABLE SAW - • Throw Out Your Thin-Ri...
CHECK OUT MY TAPER SLED VIDEO HERE - • Unlimited Possibilitie...
HOW TO MAKE A MITERED HALF LAP PICTURE FRAME - • How to Make a Mitered ...
VISIT THE INSPIRE WOODCRAFT SHOP: inspirewoodcraft.com/product-...
Adjustable Box Joint Jig Plan: inspirewoodcraft.com/product/...
Multipurpose Shooting Board Plan: inspirewoodcraft.com/product/...
All Purpose Tapering Jig Plan: inspirewoodcraft.com/product/...
If you appreciate this content and would like to help give back FREE OF CHARGE, simply give this video a “thumbs up”, leave a positive comment, subscribe to Inspire Woodcraft’s CZcams channel and SHARE THIS VIDEO with someone who you think would enjoy it. Some of the links that we’ve provided above are affiliate links. That means that when you make purchases through those links, we earn a small commission of the sale at no additional cost to you. While we do use affiliate links where we can, we only endorse products or services that we believe in. That commission is a big part of our income, which also goes back into making more videos, so by using the links you help support what we do and for that we are very grateful. - Jak na to + styl
The Pythagorean Theorem is the only algebra I ever used since high school!
Geometry not algebra
A2 + b2 =c2... ....( 2 is squared)
@@andrewbrimmer1797 Thue, but the equation, a2 + b2 = c2, is.
I LOVE your simple approaches to many wood crafting issues! Pleas, keep them coming, I LOVE your channel!
Again, thanks for sharing something I'm sure was taught in school when my attention span was less than an INCH! So appreciate your content. Thanks again for sharing
Thank you for sharing. Well known information but often forgotten. Good refresher. 🙂🙂
Another great response for the age old question of "When am I going to use this math in the real world?"! Nice job!
Thank you sir for showing us another good option checking for square. This past weekend I was checking for square on some leftover plywood that was longer than my Woodpecker square. I thought to use a level with it to extend the reach.
That's neat! Thanks for sharing this trick. 👍
I love geometry in the workshop. Makes so many things simple.
I used this on my first project, building an enclosure for a bearded dragon. I was using melamine. I only had a circular saw at the time and I bought one of those Empire edge guides from HD to assist me in cutting a straight line. I needed to make sure that all of my pieces were square so I used the 3-4-5 rule to make sure. It worked great.
Brilliant, and as usual, I totally enjoy your patient, clear, and concise teaching method. Thanks for the tip!
Another fine tip, Thank for sharing.
the 3 to 4 to 5 rule is easily get done with a folding ruler. one side 120cm, the other side 160cm and the hypothenuse have to be exactly 200cm, measured from edhe to edge of the folding ruler.
greets Carpenter from germany
Feel like I’m always disappointed in that scenario,just striving to be better at that.thanks for sharing this it has helped me do better! Thanks
Great tip. I've known this one since high school trig class. It is extremely accurate too, especially as you scale it up to say a porch or room layout. Maybe you can do a follow up showing how accurate this method is.
Thanks for the tip. FYI, another 2 sets of numbers to keep in mind like 3-4-5 are 12-16-20 & 15-20-25.
Excellent tip, dude! Thanks!!! 😊
Stay safe there with your family! 🖖😊
I’ve used this method for years. Great video
Men gettin stuff done. Love it.
Pythagoras!
Essential knowledge.
A long time ago, I learned to use the information printedon a framing square to lay out many angles. I don't think I remember much of it now, but the 3-4-5 triangle has stuck with me. I still use the trigonometric functions on a slide occasionally, as well as for arithmetic calculations. It's still the original solar powered calculator.
Used that a lot back when I was a commercial electrician and had to lay out rooms with string to know exactly where to bring up pipes for panels. You could verify the room was laid out square even before the pad was poured.
When all you've got are batter boards (badder?) to measure from you have to know how to insure your layout for stub ups is perfect.
Batter is correct
@@captainsawdust1 that's how I've said it, but I've never written it out before so when I did I wondered if I was wrong. Good to know I'm not a complete idiot lol
Personally I’m a fan of the 5-12-13 rule, or the 7-24-25 in a pinch!
Explain please
@@colinpridmore2363 Those are also perfect ratios for a right triangle. I like the 5-12-13 rule for framing walls for a hallway for example because then I can just use feet and a lot of hallways are 5 feet wide. It works well in woodworking too if you are working with rectangular pieces that are more long than square. Not as easy to remember but it is the same concept.
I prefer the 500,500,707 triangle. Works well with a millimeter ruler.
Cool trick.
thanks
i would recommend the Fastcap Square One tape measure, its all on the tape.
It would be worth mentioning that this is just the Pythagoras' theorem. Simply put, for a right-angled triangle the square of the diagonal side is the sum of the squares of the straight sides.
For a triangle with a left size of 5, a bottom of 12, the diagonal will be 13: 5^2=25, 12^2=144, 25+144=169=13^2
Another one that works well, for 45 degree angles is 1, 1, square root of 2 (1.414). I use that for many measurements, but one must remember, it's using decimal increments instead of fractions.
Smart
I understand the point of the lesson, but I also find a framing square to be really useful in the shop for things like this. I have like 5 of them because I find them at garage sales and flea markets all the time for practically nothing.
But do you check the squares are square with this? not all squares are
You’d be surprised how many people I come across in construction that don’t know how to do this ?! . I mean, people that should like dry liners bricklayers etc
Basic trigonometry for the win. Pythagoras would be proud of you.
It saddens me to see people commenting who think this is some special trick or some great secret that's being revealed.
@@bullfrogpondshop3179 I know - a lot of people don't know this and it's been around for a long time. Definitely not a secret.
If it hasnt been mentioned, 5-12-13 works great on long narrow pieces or areas. Gotta love Pythagoras...
Pythagoras triplets or you call them. Ex: (3, 4, 5) or (5, 12, 13) or (7, 24, 25), etc...
Those wacky Egyptian’s figured this out for us.
Pythagoras was a smart guy!
Or measure the whole sheet. If the diagonals are equal, all four corners are square. Yes?
And whats great about this trick it works with inches feet, centimetres, meters even miles or kilometres.
Fun fact: The area of a 3-4-5 triangle is 6 square units making it a 3-4-5-6 triangle.
Does this work in metric too?
Any unit will work. Even completely arbitrary units like a stick of random length will work.
👍🏼👍🏼👍🏼👍🏼👍🏼👌🏼😎
You could also just measure the diagonal corners. If not equal, not square. Only works if corners are crisp and not dented or worn.
What you're saying only works if you have four straight edges. This technique as long as you have two straight edges.
@@JCWren And how is something going to be square if you don't have straight edges 😮 .... the only reason to use the 3-4-5 rule is when you've found it's not square and you need to square it up!
@@barry.w.christie Read and then think. I said >TWO< straight edges are required, not >FOUR
@@JCWren Nothing in what I said is wrong ... I said straight edges, I never mentioned the number ... although if I'd known your were so pedantic I'd have qualified what I said in a more specific way ... get a life you sad little individual!
shawnstuart: That is not a good test by itself. It is only valid if you already measured the opposite edges and verified that they are equal in length. If you cannot understand this, then draw a symmetrical trapezoid with 45, 45, 135, 135 degree angles. The diagonals are equal in length.
Begrudgingly appreciating high school geometry lessons finally having practical uses...
5,12,13 also works.... a²+b²=c²
Maths? Who need dat?
Pythagoras is smiling.
Pythagoras: iron-age woodworker
Square it up 6,8,10
pythagoras theorem
square it by going 5-4-3.
Everyone knows that. I knew that in the fifth grade
I didn't know this trick in the 5th grade.
I know it too. but it never occurred to me to use it to make sure my stock was square. great video!
Here folks, we see a wild couch carpenter in their natural environment.
Well, of course you did.
@@watermain48 I learned the Pythagorean theorem in 6th grade geometry.
Another useful triangle, if you have a piece that is long, but narrow, is 5-12-13. The set of these triplets of integers has a special name in geometry and trigonometry: en.wikipedia.org/wiki/Pythagorean_triple 😉