## Reflection: Connection to Prior Knowledge The Circle (Day 1 of 2) - Section 2: Bell Work

Even though some popular Precalculus books do not introduce circles with the other conic sections, I like to treat conics as a coherent unit.  I think that beginning with circles is a great way to review concepts like completing the square. Also, by the time my students reach my Precalculus class, most have worked with circles. So, starting conics with circles is a good way to help students gain confidence at the start of this unit.

Including Circles in my Conic Sections unit
Connection to Prior Knowledge: Including Circles in my Conic Sections unit

# The Circle (Day 1 of 2)

Unit 5: Conics
Lesson 1 of 13

## Big Idea: What is the definition of a circle, really?

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Standards:
Subject(s):
Math, modeling, conic sections, circles, PreCalculus, equation of a circle, paper constructions, Conics
46 minutes

### Katharine Sparks

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