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. 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!
Free Geometry Worksheets 2D Shapes Worksheets Shapes worksheets contain tracing and coloring basic shapes, identifying different shapes, matching names, labeling, counting sides and corners, printable charts and more. Straight Line Worksheets Straight line worksheets include drawing ray, line and line segment, identifying parallel and perpendicular lines, finding length and midpoint of line segment and more. Area Worksheets Use formula or concepts to find the area of basic shapes. Triangle Worksheets Printable triangle worksheets contain classifying types, Pythagorean Theorem, missing angles, finding perimeter, area and more. Quadrilateral Worksheets Quadrilateral worksheets contain identifying types, area and perimeter, finding missing angles, simple algebra based questions and more. Circle Worksheets Circle worksheets contain finding radius, diameter, circumference and area, arc length, classifying parts of a circle and more. Surface Area Worksheets Find the surface area of three-dimensional figures. Graphing Worksheets
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Webrangers Activity: Reading a Map Reading a Map Related Links Geographic Information Systems Interactive Map Center National Park Service Maps 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). 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. Easy Origami Envelope Step 11: Tuck it under the top flap.