Twisting Triangles
These triangles twist and turn! How many different triangles can you suspend on a mobile?
1. A triangle is a simple polygon. Every triangle consists of three sides and three angles. The sum of the angles in a triangle always adds up to 180 degrees. Triangles are classified by their sides and angles. There are several types of triangles such as scalene, equilateral triangle, and isosceles.
2. In small groups, find out more about the names and types of triangles. Use Crayola® Erasable Colored Pencils to list your results. Sketch each triangle and list its characteristics. Compare your list with other groups. How many new triangles can you add to your list and show on a mobile?
3. On posterboard use your Erasable Colored Pencils to draw a variety of triangles. With Crayola Twistables, decorate and label them. Cut out the triangles with Crayola Scissors. Decorate the other side.
4. Punch a hole at the top of each triangle. Punch holes in the bottoms of some so you can hang more triangles from them.
5. On heavy cardboard, draw a large triangle. Decorate both sides of it with Twistables. Punch three holes in it. Tie yarn in the holes for hanging. Use yarn to attach the smaller triangles to the large one and/or each other. Make sure the triangles hang freely beneath the large cardboard triangle.
6. Hang your Twisting Triangle mobile near a window so it can turn in the breeze.
Adult supervision is required for any arts & crafts project. Observe children closely and intervene as necessary to prevent potential safety problems and ensure appropriate use of arts and crafts materials. Some craft items, particularly beads and buttons, are potential choking hazards for young children. Avoid use of such small parts with children younger than 3 years. Craft items such as scissors, push pins and chenille sticks may have sharp points or edges. Avoid use of materials with sharp points by children younger than 4 years. Read all manufacturers' safety warnings before using arts and craft supplies.
Scissors—ATTENTION: The cutting edges of scissors are sharp and care should be taken whenever cutting or handling. Blunt-tip scissors should be used only by children 4 years and older. Pointed-tip scissors should be used only by children 6 years and older.
String-Like Materials—Includes string, raffia, lacing, yarn, ribbon, and other similar material. Children 3 years and younger should not be given any string-like material that is longer than 12 inches. Close adult supervision is essential whenever children use string-like material. When crafts are to be worn around the necks of children 8 years and younger, attach the ends of the “string-like material” with clear adhesive tape, which allows easy release of the bond if the craft becomes entangled or caught on equipment. For children older than 8 years, the ends of the “string-like material” may be tied and knotted.
- Find some of the ways triangles are used, such as in architecture and civil engineering and create replicas of their uses.
- Count the number of triangles you can find in your classroom, school, or home. Make a graph to represent the class’s findings.
- Make a mobile with folded-paper pyramids. How many triangles form each pyramid?
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