2 years ago

The radius of a circle is 2.8 cm. Find the circumference to the nearest tenth.

Mathematics

2 answers:

Neporo4naja [7]2 years ago

6 0

Answer: 17.59 cm

Step-by-step explanation: C=2πr=2·π·2.8=17.59292 cm

oee [108]2 years ago

3 0

17.6cm
Formula c(circumference)=2*pie(3.14)*r(radius)
C=2(2.8)(pie)

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Well you can start by drawing a triangle with the information

the size of angle B can be found using the Law of Sine

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the size of angle C can be found using angle sum of a triangle.

The length of side c can be found using the Law of Cosines

$c^2 = 4.8^2 + 9.4^2 - 2 \times4.8\times9.4\times cos(C)$

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