Tuesday 8/13/13 Geometry

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Recap Developing Definitions INB 19 from yesterday.  Ensuring we discuss the appropriate notation of terms.

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In class, we partnered and played Blind Draw INB 16.  You had to choose a card containing one of the above figures, then give instructions to your partner and they tried to replicate it based solely on your directions.  If you were absent, choose 3 pictures and write your verbal directions on INB 16.

HW assignment:
1. write a reflection about the activity, tell what was hardest & easiest, why, for both roles of giving and receiving instructions.

2.  Create your own sketch, incorporating at least 1 point, 1 line, 1 plane and at least one other vocabulary term.  Include appropriate notations.  Cover your sketch with a post-it. 

Write directions for your sketch.  I will give you feedback based on how closely I can draw your sketch using your directions.

INB 18  Draw What I Say 

This page was similar to page 18, but is more scripted.  The focus is correct notation. 

If you need a copy to complete the assignment please email me.

Have a parent or friend read the instructions and you draw the figures onto INB page 18. When complete, check your drawing against the answer on  the card.  Write a short reflection, what did you do well on, what do you need to improve?

Patty Paper exploration…

Use a straightedge to draw a segment with endpoints CD. 

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Fold C to D and crease your paper.

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Unfold your paper.

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What do you see?  notice? 

Label the point where the crease intersects CD, E.

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How does CE compare to DE?  What does this tell you?

Compare the 4 angles formed…if I fold along thencrease, then fold along the segment, the 4 angles are congruent…90º.

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So that means, j is a perpendicular bisector of CD.

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Place a point, F, on j above CD.  Connect CF and DF with  straightedge.  What do you notice?

Place another point, G, on j above CD.  Connect CG and DG with a straightedge. What do you notice?

Place another point, H, on j below CD.  Connect CH and DH.  What do you notice?

Will this always be true?

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