Equations of circles

Write (x - h)^2 + (y - k)^2 = r^2 from a center and radius, and read them back from an equation.

Standards:G-GPE.A.1

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How this fits in

Equations of circles is one skill in the Coordinate Geometry unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

The distance formula
The midpoint formula
The Pythagorean theorem
Translations, reflections, and rotations
Dilations and similarity
Area and perimeter on the coordinate plane
Proving shapes with coordinates

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