1 . Parmi les triangles de ce papillon, on trouve ceux qui sont egaux et prouve le. Une rédaction rigoureuse est attendue ! PS:On me dit dans mon écouteur qu’il y a 4 paires de triangles égaux.

1 . Among the triangles of this butterfly, we find those that are equal and proves it. Rigorous writing is expected!

PS: I am told in my earpiece that there are 4 pairs of equal triangles.

Consider the following geometry problems in 3-space enter t or f depending on whether the statement is true or false. (you must enter t or f -- true and false will not work.) f equation editorequation editor 1. a plane and a line either intersect or are parallel t equation editorequation editor 2. two planes parallel to a third plane are parallel f equation editorequation editor 3. two lines either intersect or are parallel f equation editorequation editor 4. two planes orthogonal to a third plane are parallel f equation editorequation editor 5. two planes orthogonal to a line are parallel f equation editorequation editor 6. two planes either intersect or are parallel f equation editorequation editor 7. two lines orthogonal to a third line are parallel t equation editorequation editor 8. two lines parallel to a third line are parallel t equation editorequation editor 9. two planes parallel to a line are parallel f equation editorequation editor 10. two lines parallel to a plane are parallel f equation editorequation editor 11. two lines orthogonal to a plane are parallel