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

Spherical dodecahedron/icosahedron
Bessel Function
Taylor Series for 1/(1 - x)
Multiplying 4-Digit by 3-Digit Numbers Using an Area Model
Oddly Satisfying Voronoi Diagram

Discover Resources

Equality relation on Integers
Derivative of Tangent Function (Investigation)
Surface Area Cylinder
Proof 2
CYCLOID animation のコピー

Discover Topics

Dilation
Definite Integral
Rotation
Sine
Real Numbers