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?

New Resources

Modifiable Right Triangular Prism
Marion's Theorem
Writing and Graphing Proportional Relationships (k>0)
Rovnoběžnost rovin
繪畫垂直線

Discover Resources

sin/cos/tan for any angle
Positive and Negative Tiles Activity
Cyclic Quadrilateral Proof
Segment area
구면 삼각형

Discover Topics

Right Triangles
Normal Distribution
Step Functions
Fractal Geometry
Incircle or Inscribed Circle