How To: Estimate Square Roots
What Is a Square Root and a Radicand? A square root is a number that when multiplied by itself, results in its original number. For example, the square root of 16 is 4 because 4 • 4 = 16.
What Is a Square Root and a Radicand? A square root is a number that when multiplied by itself, results in its original number. For example, the square root of 16 is 4 because 4 • 4 = 16.
Weather - there's no escaping it! Mother Nature can be hard on asphalt: if you live in an area where there are extreme weather changes from season to season then your asphalt will eventually become damaged. As the ground freezes and thaws there is movement that flexes the asphalt. Repeated flexing can cause weakness to occur. In many cases the first damage you will see will be cracks forming in your asphalt driveway.
Chemical engineers at Cornell have created a small device that may one day turn troops into real life spider-men. The device would cradle in the palm of the hand, allowing troops to scale walls. It uses an adhesive inspired by the Floridian leaf beetle, an insect that "can adhere to leaves with power 100 times stronger than its own body weight".
Knot tying is the one of the first steps in becoming a well rounded, successful Boy Scout. Who better to learn from than the Boy Scouts themselves? Follow along with this knot tying guide to learn how to tie several knots. Click on the right hand menu to learn the following knots:
This article will teach you how to make an iPod video projector for about $6 (depending on what materials you have) that works pretty well. First off, you need to gather your materials. I had everything except the magnifying glass, which I bought for $3.
Materials 1 2-liter bottle or large water bottle
Ingredients For a one-crust pie:
Need to know how to use your Texas Instruments graphing calculator for your college math or statistics class? You're in luck... watch this video tutorial to see how to perform a chi-square test on a TI-83 graphing calculator.
This video shows you how to drill a square hole. Drill a square hole.
Fold an origami cat on a cushion. Origami Club in English is a free origami information site, with origami animations and origami diagrams.
When replacing an old faucet there are generally three things to consider: how many holes your sink has, how far apart they are, and whether or not you will need to replace the drain.
Perry Watkins' clownish mini car, "The Wind Up", is officially the world's smallest street legal vehicle, standing at 41 inches high, 51 inches long and 26 inches wide. The wind up mechanism is purely cosmetic; the car operates as a regular-sized car does, with a tiny engine that can go up to 60kph (37mph).
Watch this video tutorial to see how to create a giant spider web with rope and bolts. To make this giant Halloween spider web effect, you'll need a bunch of rope, a frame and 24 eye bolts. You can use this technique to weave a spider web at any scale, as long as you have an even number of at least 24 points to fasten to, around four sides.
There are many different putting styles and techniques. So many, in actual fact, it's easy to get confused and wind up a worse putter than you were before. Jeremy Dale believes it doesn't matter how you go about holing your putts, all that you need to focus on is keeping the blade of the putter square as you make your stroke. It's that easy! Learn to keep your putter square.
Tennis professional Francis Ribeiro explains that there are three drills you can do to improve your footwork and coordination: footwork square, pick up drill, jog and slide. Doing the footwork square develops your speed and coordination while the pick up drill will improve your hand to eye coordination. Improve your footwork and coordination.
This video tutorial shows you how to make an eighteen inch armature, just out of some basic hardware. You will need some 3/4 inch pipe and a length of heavy gauge wire, as well as some wire cutters and pliers. Construct an armature out heavy gauge wire.
This ornament can be challenging for a novice, but rewarding for everyone who takes the time to complete the project. With its notably awkward and fascinating texture, you will be sure to impress all who see this.
Ingredients ½ teaspoon active dry yeast
For an object to balance, you have to have the center of gravity directly above the base. Well, reverse that to see that you can also balance an object by having the center of gravity directly below its base.
Pull ToyI love dogs, but the toys can get really expensive. This is an easy to make, inexpensive way to make a toy that really works. My dog loves it! The materials you will need is an old dish towel and a pair of scissors.
In this tutorial, we learn how to make a no sew fleece blanket. First, you will need to purchase fleece in a large size, large enough to be a comfortable blanket. Next, lay the fleece flat down and cut fringe down on two sides, four inches apart. On the other two sides (opposite from each other), cut fringe one inch between each other. Next, tie your one inch fringes into individual knots. These are great blankets to make for charity, because they are not only soft and warm, they are inexpens...
Watch this how-to video and make a lighter that never runs out of fuel and that's so simple, it can't break. It works just like a Diesel engine - as air is rapidly compressed it heats to over 800 degrees. You can make one for just a couple dollars. This video tutorial will show you how to be prepared in the wilderness, or the apocalypse. Just make your own fire piston.
Watch this video from This Old House to learn how to build a retaining wall. Steps:
Watch this video from This Old House to learn how to reshingle a roof. Steps:
Watch this video from This Old House to learn how to remove a tree stump. Steps:
It's always a party when Sock Puppy is around. Dig into your sock drawer to create a cuddly new pal with puppeteer John Kennedy and his pal Tabitha in this how-to video. It's so fun and easy you can create a litter of sock puppies in no time! You will need a tube sock, a 3 1/2 square of poster board, a 3 x 4 piece of fur, a 3 x 5 piece of batting, a 3" square of red felt, two 3/8" black pom-poms, 1 black pom-pom, two 1 white pom-poms, sixteen 1/2" brown pom-poms, a 1 x, 3 pieces of pink sheet...
Imatfaal's awesome post on Escher's tessellations on Polyhedra reminded me of some ornaments I made this summer. I made some of Escher's square tessellations onto cubes and then reprojected them onto spheres. I actually used a 60 sided Deltoidal hexecontahedron since that net is fairly easy to fold and looks pretty round.
Cory's post with instructions and templates Here's my first attempt at the 30 squares model. I needed to be a little bit more careful in the measuring and cutting as not everything matches up - but it is still a really pleasing shape.
It's Monday, which means once again, it's time to highlight some of the recent community submissions posted to the Math Craft corkboard. In this post, we'll also make a flexagon, which is a type of transformable object.
30 Japanese schoolchildren, leg-to-leg. And they're good. Really good. What was I doing at that age, in the neon-lit elementary school gymnasium? Square dancing. Sweaty-palmed square dancing.
The Movie Trailer for "The Square" features some nice type treatment tie in with the poster above.
This origami video tutorial will show you how to make an origami paper bird and tree. First, fold the square piece of paper in half diagonally. Then fold the paper in half again. Now, fold it in half and open the last fold back up. The flap that is unfolded now is the one that you open slightly and flatten. Flip the paper over and do the same thing you just did to the other side, as well. Now that the paper is a small square, you take one of the bottom corners (the open ones) and you fold it ...
Ingredients ½ cup unbleached, all-purpose flour
You'll be so glad to know how to KNIT THIS LITTLE PURSE. You'll want to make one for everyone you know. You can start and finish it in a little over an hour. You can knit it all one color and embellish it with buttons (see photo below) or you can make stripes (as on the video below) or use two colors (as on the photo above). You can make it in a flat stockinette stitch or something more interesting like the Raspberry Stitch. Do what you want and just have fun.
This is a video tutorial in the Arts & Crafts category where you are going to learn how to fold an origami bird parent and child. Take a sheet of square paper and fold it in half diagonally. Then fold it again. Now open up the top half and fold it back over itself. Repeat this with the other half as well. Now you have folded square sheet of paper. Then lift up the corner and fold it back over itself. Repeat this step with one corner from the side. You have to watch the video for further steps...
The two-hook panfish rig is meant for vertical fishing under the boat in fairly deep water, for deep-dwelling fish like crappie, catfish, bluegills, and sometimes even bass. It involves two hooks hanging off the line, off droppers, to fish close to the bottom. Watch and learn as Wade Bourne of MyOutdoorTV shows you how to fish a two-hook panfish rig.
Watch this video from This Old House to learn how to install kitchen cabinets. Steps:
Watch this video from This Old House to learn how to repair clapboard. Steps:
Reading FC Academy Manager Eamonn Dolan takes you through some advanced passing drills. Basic soccer drills for passing so that you can up your game. The passing square drill is a team drill that teaches passing. Practice advanced passing drills.
Balloons are fun, but the helium ones are always more entertaining. So today, we're going to learn how to make hydrogen gas by combining toilet bowl cleaner with aluminum foil. With hydrogen, you get the same lighter-than-air properties of helium, plus it will explode! Historically, this has proven disastrous, but for our tiny-scale experiments, it will be safe and fun!