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?

Nuevos recursos

Angle Addition Postulate (V2) - Integer Solutions
Perpendicular Lines: Quick Exploration
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Graphing Basic and Compound Inequalities
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Geogebra Presentation Glo #4
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FSMQ: Estimating area under curve by rectangles
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