Question

find the circumference of a circle whose diameter is 86 cm​

Answer 1

Step-by-step explanation:

circumference= 2πr

circumference of the circle=2π×43 cm

=86π

Answer 2

$\huge\star{\red{\underline{\mathfrak{Answer :-}}}}$

270.28 cm

$\huge\star{\red{\underline{\mathfrak{Explanation :-}}}}$

Diameter = 86 cm

Radius = 43 cm

Circumference :-

$= 2\pi \: r$

$= 2 \times \frac{22}{7} \times 43$

$= 270.28 \: cm$

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Formulas :-

• 2 pi r : circumference
• pi r^2 : area
• (pi r^2)/2 : area of semi circle

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