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The diameter of a circle is 18 centimeters. What is the circle's circumference?

Sagot :

Itz5151

Answer:

Circumference ≈ 56.55

Step-by-step explanation:

Given:

  • Diameter = 18 cm

To Find:

  • The circumference of the circle

Solution:

Here we'll use the formula of finding the circumference,i.e :

[tex] \boxed{\rm \: C = πd}[/tex]

  • Here, d = diameter
  • The value of π is not given, so let us take π = 3.14
  • C = circumference

Substitute them onto the formula:

  • d = 18 cm
  • π = 3.14

[tex]\rm C = \pi(18) \: cm[/tex]

[tex]\rm C = 3.14 \times 18 \: cm[/tex]

[tex] \boxed{\rm C \approx \: 56.55}[/tex]

Hence, the circumference of the circle is 56.55(approx).

TwinklingStar

Given :-

  • Diameter = 18 cm

To Find :-

  • Circumference = ?

[tex]\qquad\rule{150pt}{2pt}\\ [/tex]

Solution :-

☼︎ Radius of the Circle;

Using Formula:

[tex]\red\bigstar {\underline{\boxed{\color{springgreen}{\textsf{ \textbf{ \: Diameter \: of \: circle= 2 \: ×\: r \: }}}}}} \\ \\ [/tex]

[tex]\sf\implies Diameter = 2× r \\ [/tex]

[tex]\sf\implies 18 = 2× r \\ [/tex]

[tex]\sf\implies r = \frac{18}{2} \\ [/tex]

[tex]\sf\implies r = \cancel \frac{18}{2} \\ [/tex]

[tex]\sf\implies r = 9 cm \\ \\ [/tex]

[tex]\qquad\rule{150pt}{2pt}\\\\ [/tex]

☼︎ Circumference of the Circle;

Using Formula:

[tex] \pink\bigstar {\underline{\boxed{\color{red}{\textsf{ \textbf{ \: Circumference \: of \: circle \: = \: 2 \: π\: r \: }}}}}} \\ \\ [/tex]

[tex] \sf \implies \: Circumference \: = \: 2 \: π\: r \\ [/tex]

[tex]\sf \implies \: Circumference \: = \: 2 \: \times \: 3.14\: \times \: 9 \\ [/tex]

[tex]\sf \implies \: Circumference \: = \: 2 \: \times \: 3.14\: \times \: 9 \\ [/tex]

[tex]\sf \implies \: Circumference \: = \: 56. 52 \:cm \\\\ [/tex]

[tex]\qquad\rule{150pt}{2pt}\\ [/tex]

henceforth, the circumference of the Circle is 56.52 cm...!!

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