# Find the central angle 𝜃.

Find the radian measure of the central angle of a circle of radius r = 90 inches that intercepts an arc of length s = 130 inches. Summary: The radian measure of the central angle of a circle of

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## S = Rθ Formula and Equation

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## Find the central angle 𝜃.

The formula is $$S = r \theta$$ where s represents the arc length, $$S = r \theta$$ represents the central angle in radians and r is the length of the radius. Demonstration of the Formula $$S = r \theta$$