Instructional Video
Sophia Learning

Sophia: Intermediate Proof

9th - 10th Standards
Use the two-column proof and the flow proof to prove two triangles congruent.
Instructional Video
Sophia Learning

Sophia: Introduction to Geometric Proof

9th - 10th Standards
Explore the structure and how to complete a flow proof and a two-column proof.
Instructional Video
Sophia Learning

Sophia: Proof (Harder)

9th - 10th
This geometry resource discusses two types of proof. Video lessons demonstrating a flow proof and a two-column proof are included.