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10 questions from this quiz
A portion of the circle's circumference
Region bounded by two radii and the arc
l=rθl = r\thetal=rθ
A=12r2θA = \frac{1}{2}r^2\thetaA=21r2θ
Arc length plus two radii
Formulas are simpler and more elegant
2π2\pi2π cm
2π3\frac{2\pi}{3}32π
0.90.90.9 radians
100π3\frac{100\pi}{3}3100π cm²
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