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SAT Math›Unit 4: Geometry and Trigonometry›Circles

Equations of Circles

A circle centered at (h, k) with radius r is (x − h)² + (y − k)² = r². When it's given expanded, complete the square to find the center.

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Reading center and radiusCompleting the square twiceArc length and sectors

33 videos · ranked by how well they teach

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SAT Math Questions Review - Circles (Area, Circumference, Sectors, Arcs, Radius, Diameter, Tangents)

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20

Everything You Need To Know About Circles on the SAT

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Unit 4: Geometry and Trigonometry

Right Triangle Trigonometry
Similar Triangles
Equations of Circles

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Also called: circles, equation of a circle, arc length, radians