Graph a triangle (Imn) and reflect it over the
line y=x to create triangle l'm'n'. describe the
transformation using words. draw a line
segment from point I to the reflecting line,
and then draw a line segment from point l' to
the reflecting line. what do you notice about
the two line segments you drew? do you think
you would see the same characteristic if you
drew the line segment connecting m with the
reflecting line and then m' with the reflecting
line? how do you know?

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