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If the area of a circle is 154 cm square then find the diameter and circumference​

User Duyker
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1 Answer

20 votes
20 votes

Answer:

Diameter = 14 cm

Circumference = 44 cm

Explanation:

  1. Area of circle = πr²
  2. Diameter = 2r
  3. Circumference = 2πr = πd
  4. π 3.142


\pi {r}^(2) = 154 \\ {r}^(2) = (154)/(\pi) \\ r = \sqrt{ (154)/(\pi) } \: cm


Diameter = 2r \\ = 2 \sqrt{ (154)/(3.142) } \\ ≈ 14 \: cm


Circumference = πd \\ = 14\pi \\ = 14 * 3.142 \\ = 43.988 \\ ≈ 44 \: cm

User Raunak Jhawar
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