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Audrey was attempting to draw a picture that would be the cover of the upcoming movie, Up 2. Thepicture would be of the house being carried by balloons again. She started her drawing with theballoons, which she wanted to make all the same size.She drew a circle for the balloon and found the radius, which was 9cm. How big around will all ofAudrey's balloon drawings be?——Please help me.

Respuesta :

Audrey drew a circle for the balloon, this circle has a radius of 9 cm.

To know how big the baloon is you have to determine its circumference.

To calculate the circumference of a circle you have to multiply its diameter by number pi:

[tex]C=d\pi[/tex]

The formula is C=dπ

The diameter is twice the circle so the diameter of the baloon is:

[tex]\begin{gathered} d=2r \\ d=2\cdot9 \\ d=18\operatorname{cm} \end{gathered}[/tex]

The calculation for the diameter is:

d=2r

d=2*9

d=18cm

So the circumference of a circle with diameter 18cm is:

[tex]\begin{gathered} C=18\pi \\ C\cong56.548\operatorname{cm} \end{gathered}[/tex]

For this balloon:

C=18π

C≅56.548xm

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