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never [62]
3 years ago
14

Calculate the circumference of the following circles correct to one decimal place

Mathematics
2 answers:
Finger [1]3 years ago
7 0
Given,
Diameter of circle=15cm

so, radius= D/2= 15/2

we know that circumference=perimeter

2πr= 2×22/7×15/2=47.1428cm
kolbaska11 [484]3 years ago
5 0

Answer:

47.1 cm

Step-by-step explanation:

For this problem, I'll use an approximation of \pi \approx 3.14, which is good enough for the level of accuracy we need. The definition of π itself is given by the equation

\pi =\frac{c}{d}

where c is the circumference of a circle and d is its diameter. If we want to find the circumference, we can simply multiply both sides of that equation by d to get the formula

c=\pi d\approx3.14d

Here, we're given d = 15 cm, so plugging that in, we find our circumference to be

c\approx3.14(15)=47.1

So the circumference of this circle is approximately 47.1 cm.

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