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2 years ago

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

Mathematics

1 answer:

german2 years ago

8 0

Answer:

Diameter = 14 cm

Circumference = 44 cm

Step-by-step explanation:

Area of circle = πr²
Diameter = 2r
Circumference = 2πr = πd
π ≈ 3.142

$\pi {r}^{2} = 154 \\ {r}^{2} = \frac{154}{\pi} \\ r = \sqrt{ \frac{154}{\pi} } \: cm$

$Diameter = 2r \\ = 2 \sqrt{ \frac{154}{3.142} } \\ ≈ 14 \: cm$

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

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4 years ago

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3 years ago

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

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