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# Origami triangles

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Origami triangles: equilateral, isosceles, right

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### Origami triangles

1. 1. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Origami Triangles Matem´ticas 1o E.S.O. a Alberto Pardo Milan´s e -
2. 2. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 1 Vocabulary 2 Triangle 1 3 Triangle 2 4 Triangle 3Alberto Pardo Milan´s e Origami Triangles
3. 3. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 VocabularyAlberto Pardo Milan´s e Origami Triangles
4. 4. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Vocabulary Vocabulary: Side: lado Crease: doblez, doblar Fold: doblez, doblar Perpendicular bisector of a segment: mediatriz, linea que divide un segmento por la mitad Open out: desdoblar Unfold: desdoblar Bisector of an angle: bisectriz, linea que divide un ´ngulo por la a mitad Turn over: dar la vuelta Reach: llevar, hacer que coincida Fold over: Doblar por encima Create these triangles and write the names of the points we use.Alberto Pardo Milan´s e Origami Triangles
5. 5. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1Alberto Pardo Milan´s e Origami Triangles
6. 6. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 1.- Start with a square of paper, the vertices are A, B, C y D. Write the names on both sides.Alberto Pardo Milan´s e Origami Triangles
7. 7. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 1.- Start with a square of paper, the vertices are A, B, C y D. Write the names on both sides.Alberto Pardo Milan´s e Origami Triangles
8. 8. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 2.- First make a crease that divide the square in two by the perpendicular bisector of AB.Alberto Pardo Milan´s e Origami Triangles
9. 9. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 3.- Open out. O is the middle point of the side AB.Alberto Pardo Milan´s e Origami Triangles
10. 10. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 4.- Make a crease from O to C.Alberto Pardo Milan´s e Origami Triangles
11. 11. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 5.- Fold the bisector of angle COA.Alberto Pardo Milan´s e Origami Triangles
12. 12. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 6.- Make a crease from O to D.Alberto Pardo Milan´s e Origami Triangles
13. 13. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 7.- Fold the bisector of angle DOB.Alberto Pardo Milan´s e Origami Triangles
14. 14. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 8.- Turn over and paint the triangle.Alberto Pardo Milan´s e Origami Triangles
15. 15. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 1 9.- This an triangle. 10.- The base is 10 cm long and the triangle is 10 cm high. The area of the triangle is cm2 .Alberto Pardo Milan´s e Origami Triangles
16. 16. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2Alberto Pardo Milan´s e Origami Triangles
17. 17. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 1.- Start with a square of paper, the vertices are A, B, C y D. Write the names on both sides.Alberto Pardo Milan´s e Origami Triangles
18. 18. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 2.- First make a crease that divide the square in two by the perpendicular bisector of AB.Alberto Pardo Milan´s e Origami Triangles
19. 19. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 3.- Unfold. E is the middle point of the side AB. F is the middle point of the side CD.Alberto Pardo Milan´s e Origami Triangles
20. 20. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 4.- Reach D to segment EF by vertex C.Alberto Pardo Milan´s e Origami Triangles
21. 21. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 5.- Fold over segment AC.Alberto Pardo Milan´s e Origami Triangles
22. 22. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 6.- Fold back by A creating a right angle.Alberto Pardo Milan´s e Origami Triangles
23. 23. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 7.- Turn over.Alberto Pardo Milan´s e Origami Triangles
24. 24. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 8.- Fold on the back the paper not needed.Alberto Pardo Milan´s e Origami Triangles
25. 25. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 9.- Paint the triangle.Alberto Pardo Milan´s e Origami Triangles
26. 26. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 2 10.- This a triangle. 11.- The hypotenuse is 10 cm long. The smaller leg is 5 cm long. Use Pytagorean Theorem to ﬁnd the length of the other leg.Alberto Pardo Milan´s e Origami Triangles
27. 27. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3Alberto Pardo Milan´s e Origami Triangles
28. 28. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 1.- Start with a square of paper, the vertices are A, B, C y D. Write the names on both sides.Alberto Pardo Milan´s e Origami Triangles
29. 29. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 2.- First make a crease that divide the square in two by the perpendicular bisector of AB.Alberto Pardo Milan´s e Origami Triangles
30. 30. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 3.- Unfold. E is the middle point of the side AB. F is the middle point of the side CD.Alberto Pardo Milan´s e Origami Triangles
31. 31. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 4.- Reach D to segment EF by vertex C.Alberto Pardo Milan´s e Origami Triangles
32. 32. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 5.- Fold over segment AC.Alberto Pardo Milan´s e Origami Triangles
33. 33. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 6.- Unfold every crease.Alberto Pardo Milan´s e Origami Triangles
34. 34. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 7.- Reach C to segment EF by vertex D.Alberto Pardo Milan´s e Origami Triangles
35. 35. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 6.- Fold over segment BD.Alberto Pardo Milan´s e Origami Triangles
36. 36. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 7.- Unfold every crease and mark point G on EF (on both sides) as seen in the picture.Alberto Pardo Milan´s e Origami Triangles
37. 37. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 8.- Crease by DG.Alberto Pardo Milan´s e Origami Triangles
38. 38. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 9.- Crease by CG.Alberto Pardo Milan´s e Origami Triangles
39. 39. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 10.- Fold on the back the paper not needed.Alberto Pardo Milan´s e Origami Triangles
40. 40. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 11.- Turn over and paint the triangle.Alberto Pardo Milan´s e Origami Triangles
41. 41. Indice Vocabulary Triangle 1 Triangle 2 Triangle 3 Triangle 3 12.- This an triangle. 13.- Every side is 10 cm long. Half a side is 5 cm long. Use Pytagorean Theorem to ﬁnd the height of the triangle.Alberto Pardo Milan´s e Origami Triangles