Question

find the circumference of a circle whose diameter is 4.2 cm ​

Answer 1

Circumference = πd

π×4.2=13.1946891451

2dp=13.19cm²

3sf=13.2cm²

2sf=13cm²

Answer 2

Answer:

• The circumference of the circle = 13.2 cm

Given:

• Diameter of the circle is 4.2 cm

Need to find:

• The circumference of the circle = ?

Solution:

Diameter of circle = 4.2 cm

Therefore,

• Radius of circle = 2.1 cn

Formula used here:

• Circumference = 2πr

Putting the values:

➜ Circumference = 2 × 22/7 × 2.1

➜ Circumference = 2 × 22 × 0.3

➜ Circumference = 13.2 cm

Therefore:

• The circumference of the circle is 13.2 cm.

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