This algebra video explains how to graph circles in standard and how to write equations of circles in standard form. This video on conic sections contains plenty of examples and practice problems.
Conic Sections - Free Formula Sheet: https://www.video-tutor.net/precalculus-formula-sheets.html
Conic Sections - Video Lessons:
https://www.video-tutor.net/conic-sections.html
Final Exam and Test Prep Videos:
https://bit.ly/41WNmI9