Parallel sides cut proportionally APS

Directions

Move point D along segment AC. Notice the slopes (shown in red) of segments DE and AB (what does this tell you about lines DE and AB? What happens to the ratios

and

as you move point D?

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Scan to show a conic related to d, F, e.
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גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם

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