GSP Activity: Parallel Lines and Transversals
Observations
1. Select the points A, G, and E (in that order) and from the Measure menu choose Measure ®Angle. This should cause the measurement for the angle ÐAGE to appear. Repeat this for ÐEGB, ÐAGH, ÐBGH, ÐGHC, ÐGHD, ÐCHF, and ÐDHF.
2. Drag the points G or H around and observe how the values of the angles change. Record these angles for four (4) different positions in the table below.
| Angle |
Position 1 |
Position 2 |
Position 3 |
Position 4 |
| ÐAGE
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| ÐEGB
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|
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| ÐAGH
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|
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| ÐBGH
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|
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| ÐGHC
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|
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| ÐGHD
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| ÐCHF
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| ÐDHF
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|
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3. In the diagram below, indicate which angles are equal to each other (use · and ´ to show which angles are equal).
