AMC / AIME · Circle Geometry · Easy

Circle Geometry: Find the circumference of a circle with diameter math in terms of math.

Chords, arcs, angles.

Try the problem

Find the circumference of a circle with diameter 1212 in terms of π\pi.

Hint and answer

Concept to use

Central angles.

Hint

Use radius, diameter, arc, and angle relationships.

Answer

12\pi

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