Congruence Theorems. Cube Nets. Measuring Angles with a Protractor. National Library of Virtual Manipulatives. Illuminations: Welcome to Illuminations. Java. Parts of a Circle - MathsClass. Webrangers Activity: Reading a Map. Reading a Map Related Links Geographic Information Systems Interactive Map Center National Park Service Maps. Mathematical Pi Song. How pi was first calculated. Area and Perimeter. Interactive Math Activities, Demonstrations, Lessons with definitions and examples, worksheets, Interactive Activities and other Resources.
3D Shapes . Prisms. Scribble Maps - Draw on google maps with scribblings and more! Protractor. Whiteboards - Primary Mathematics. Mathematical applets and videos for 11- to 19-year-olds. Geometry Resources Wall. Math. Illustrativemathematics.
Let's Make a Flexagon. Let's Make a Flexagon Flexagons are flat models made from folded strips of paper that can be flexed to reveal a number of hidden faces. They are amusing toys that have also caught the interest of mathematicians and paper crafters alike. We will be making one of the simplest types, called a trihexaflexagon, which can reveal six unique patterns. Here is a video of the flexagon in action. Click on the size button (to the right of the volume button) for a full screen view.
To make your own flexagon, you will need to print the flexagon template (a pdf file) in colour on legal (8.5 x 11 in) paper. Crease along all the diagonals and along the centre. Turn the template over to the non coloured side. Fold the left side under to create a mountain fold between the blue and red triangles. Fold under again between the blue and red triangles. Now glue the two single layer flaps together to enclose all the uncoloured paper. Congratulations! Download Poly Pro. Circles - angles formed by radii, chords, tangents, secants. Mod3fl5. Longitude/Latitude Demonstrator.
Latitude and Longitude - interactive skill builder. Table of Contents - Math Open Reference. Easy Origami Envelope Folding Instructions - How to make an Easy Origami Envelope. This is a great one - the easy origami envelope. You write your message or letter, then fold it into an envelope - all with just a single sheet of paper! Made this origami? Comment and Submit your photo using the comment box at the end of this page! Easy Origami Envelope Step 1: Start with an A4 paper (8 inch x 11.5 inch). It should work with most rectangles too.
Easy Origami Envelope Step 2: Fold paper in half as shown below. Easy Origami Envelope Step 3: Fold the top right down to meet the center crease. Easy Origami Envelope Step 4: Now fold the bottom left to meet the center crease. Easy Origami Envelope Step 5: Now fold the right side to meet the left vertical edge. Easy Origami Envelope Step 6: Fold the left side to meet the right vertical edge. Easy Origami Envelope Step 7: Rotate the paper 90 degrees clockwise: Easy Origami Envelope Step 8: Fold the right side down to meet the bottom edge.
Easy Origami Envelope Step 9: Open the bottom flap and tuck in the right side. Back: Front: Sweet Home High School Math Textbooks. Mathematics Illuminated. WisWeb applets.