we can start of by finding the area of a <em>CIRCLE</em>
18/2=9
9=radius
area of circle= pi*r squared
9 squared=81*pi=254.4690
<em>Now we can half the area of the circle to find out the area of the semi circle as a semi circle is just half a circle therefore half the area of a circle</em>
The range is the difference between the LOWEST value and the HIGHEST value. The range is the set of POSSIBLE output values, and that is shown on the Y-AXIS!!
