Question

If the radius of a circle is 7 cm,then find its diameter and its circumference .std 8 ​

Answer 1

Answer:

d= 14 cm , c= 43.96 cm

Step-by-step explanation:

given : r = 7 cm

diameter = r*2 = 7*2 = 14 cm

circumference = 2*3.14*r = 2*3.14*7 = 43.96 cm

Answer 2

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formula of circumference = 2 pie r

Radius = 7cm

2 pie r

$2 \times \frac{22}{7} \times 7 \\ \\ = 2 \times 22 \\ = 44$

= 44cm

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hope it helps