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Geometry · Circles

Circle radius 0.5

\frac{1}{2}

Step by step

  1. r = \frac{1}{2}

    Everything about a circle follows from its radius.

  2. d = 2r = 1

    Diameter.

  3. C = 2\pi r = \pi \approx 3.1416

    Circumference.

  4. A = \pi r^2 = \frac{\pi}{4} \approx 0.78540

    Area.

Reveal the answer
C = \pi,\quad A = \frac{\pi}{4}