Geom · Unit 13

Equations of Circles

(x−h)² + (y−k)² = r²

Curriculum standard — Represent stage of the Thinking Ladder

Multiple representations

The symbolic form of this concept.

Three pathways, one topic

Study equations of circles at three depths

Grade/course-level problems with full understanding.

Parameters, multiple representations, proof, and modeling.

Non-routine problems and competition applications.