Question 840371
<pre>
45 degrees is to 360 degrees as the area of the sector is to the area of the whole circle:

45°:360° = x:80cm²

{{{"45°"/"360°"}}}{{{""=""}}}{{{x_cm^2/80_cm^2}}}

360x = (80)(45)
360x = 3600
   x = {{{3600/360}}}
   x = 10

The area of the sector is 10 cm²

Edwin</pre>