Home · Unit 2 · Topic 3 · Geometric proofs using vectors

Geometric proofs using vectors

Prove midpoints of the sides of a quadrilateral join to form a parallelogram.

u2-t3-s2-d2

Interactive

Midpoints of a quadrilateral form a parallelogram

demo

Drag any quadrilateral ABCD; midpoint figure PQRS stays a parallelogram. Step the vector proof (Varignon).

Open fullscreen →

Request an applet

Describe the interactive you’d like — same inbox as applet feedback, tagged as a request for this syllabus id.