Isosceles Triangle
Isosceles Triangle
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Isosceles Triangle |
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Folding sheets Isosceles Triangle Welcome page Back to the list |
Aveuglami project - folding sheet
Isosceles Triangle
| Author | Diverse |
| Category | orimaths |
| Difficulty | ** |
| Format | square |
| Base | - |
| Text | A triangle with two sides of the same length (or two angles of the same size) is said to be
isosceles. Two methods for creating isosceles triangles are described.
Method 1 - A4 format 1. Take an A4 sheet of paper, hold it vertically. 2. Bring, by a valley fold at 45° from left to right and from top to bottom, the upper edge of the rectangle along its right edge. We obtain a rectangular trapezoid whose tip is turned upwards. The tip consists of a right triangle with the hypotenuse located at the top left. The bottom consists of a single-thick rectangle in a horizontal position. 3. Bring, using a 45° valley fold from bottom to top and from left to right, the short left side of the lower rectangle along the left side of the triangular flap. 4. Flip the fold from right to left. This operation allows you to have a triangle with a smooth face. 5. Turn the fold so that its short side is horizontal. All you have to do is check that it is indeed an isosceles triangle. Method 2 - square format 1. Take a square sheet, hold it in a horizontal position. 2. Bring, through a vertical valley fold from left to right, the left side to the right side. We have a hinge fold on the left. 3. Make a valley fold, through all thicknesses, starting from the lower right apex and passing through any point of the hinge fold. Mark the fold well. Unfold. 4. Open the fold by rotating the upper flap from right to left around the hinge fold. 5. From the lower right corner by a valley fold obliquely to the left. 6. From the lower left corner by a mountain fold obliquely to the right. The two folds meet at the same point on the median vertical valley fold. 7. Transform the mountain fold into a valley fold, by folding the sheet along its entire length. 8. Using the valley fold that extends from the bottom right apex, fold the sheet through all thicknesses. 9. Remove any excess paper. 10. Flip the fold. |
| Contents | File |
| Isosceles Triangle - PDF file | ML-Orimaths04Ang.pdf |