GeoGebra: Edge Lengths and Volumes IM 8.8.12
GeoGebra

“Edge Lengths and Volumes” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.

GeoGebra: The Converse IM 8.8.9
GeoGebra

“The Converse” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.

GeoGebra: Applications of the Pythagorean Theorem IM 8.8.10
GeoGebra

“Applications of the Pythagorean Theorem” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.

GeoGebra: Proofs Without Words
GeoGebra

Here is a GeoGebraBook of Proofs Without Words for the Pythagorean Theorem.