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qwelly [4]
3 years ago
6

Find the radius of a circle whose circumference is 31.4 centimeters. Approximate pi as 3.14.

Mathematics
2 answers:
Readme [11.4K]3 years ago
7 0

Answer:

5\:\mathrm{cm}

Step-by-step explanation:

The circumference of a circle is given by C=2\pi r, where r is the radius of the circle.

What we're given:

  • C of 31.4

Solving for r:

31.4=2\cdot 3.14 \cdot r,\\r=\frac{31.4}{2\cdot 3.14}=\boxed{5}

Sonja [21]3 years ago
7 0

Answer:

Radius of circle is 5 cm.

Step-by-step explanation:

<h3>Given that</h3>
  • Circumference of circle = 31.4 cm
  • Using value of π = 3.14
<h3>To Find :-</h3>

Radius of circle

<h3>Formula Used </h3>

Circumference of circle = 2 × π × r

<h3>Solution :-</h3>

Using Formula

Circumference of circle = 2 × π × r

Substitute the values into the formula

31.4 cm = 2 × 3.14 × r

multiply

31.4 cm = 6.28 × r

Divide , we get

31.4 cm /6.28 = r

5 cm = r

Hence, Radius of circle is 5 cm.

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I have no idea :( Please help
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