Today in Geometry we are learning about theorems related to perpendicular lines. Yay! First we looked back to what we learned about parallel, perpendicular and skew lines:
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| what I asked for |
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| what they came up with |
Big realization was the difference between parallel and skew lines. Neither touch, but parallel lines are in the same plane, skew are not. The visuals, and trying to represent 3-D in 2-D for the skew lines, really helped drive this home.
Then...
Those are my examples on the door and the file cabinet. But it was a nice day...so we went outside! Results varied and I'll improve the direction in the following class periods, but here are some of the clearer pictures...
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| All right angles are congruent. |
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| If two lines are perpendicular, then they intersect to form four right angles. |
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| If two lines intersect to form adjacent congruent angles, then the lines are perpendicular. |
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| If two lines intersect to form adjacent congruent angles, then the lines are perpendicular. |
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| If two sides of adjacent acute angles are perpendicular, then the angles are complementary. |
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| If you give freshmen chalk, then they draw pretty flowers. |
Fun activity - next time I'll make sure to show clearer examples. Also, I ended up taking pictures on my phone and uploading to shared google drive folder. They could then download from there.
We went outside and created something - a good day!
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