gabriellep9083 gabriellep9083
  • 11-02-2020
  • Mathematics
contestada

A circular copper decoration has a diameter of 2 in. How much more area would a circular decoration with a diameter of 6 in. have?

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frika
frika frika
  • 17-02-2020

Answer:

[tex]8\pi \ in^2[/tex]

Step-by-step explanation:

1. Find the area of the circle with diameter of 2 in. If diameter is 2 in, then the radius is [tex]2\div 2=1\ in.[/tex]

Area [tex]=\pi r^2=\pi\cdot 1^2=\pi \ in^2[/tex]

2. Find the area of the circle with diameter of 6 in. If diameter is 6 in, then the radius is [tex]6\div 2=3\ in.[/tex]

Area [tex]=\pi r^2=\pi\cdot 3^2=9\pi \ in^2[/tex]

3. Find the difference in area:

[tex]9\pi -\pi =8\pi \ in^2[/tex]

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