Question

Find the area of a circle with a radius of 13 inches use 3.14 for pi do not round your answer

Answer 1

The area is:

530.66 in^2

Step-by-step explanation:

To find the circle's area, use the formula
`\sf{A=\pi r^2}`.

where:

A = area;

π = 3.14 (pi);

r = radius

Diagram:

`\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\qbezier(2.3,0)(2.121,2.121)(0,2.3)\qbezier(-2.3,0)(-2.121,2.121)(0,2.3)\qbezier(-2.3,0)(-2.121,-2.121)(0,-2.3)\qbezier(2.3,0)(2.121,-2.121)(-0,-2.3)\put(0,0){\line(1,0){2.3}}\put(0.5,0.3){\bf\large 13\ in}\end{picture}`

Plug in the data:

• 
  `\sf{A=3.14*13^2}`
• 
  `\sf{A=3.14*169}`
• 
  `\sf{A=530.66\:in^2}`

Answer 2

Here is the answer with absolutely no rounding. You can round to however many you need. 530.9291585

The equation if you need it: (pi)r^2