Question 1191610
.
<pre>

It is 1/4 of the area of the circle minus the area of the right-angled isosceles triangle with the leg of 10 cm


    area = {{{(pi/4)*10^2 - (1/2)10^2}}} = {{{(pi/4-1/2)*100}}} = {{{(3.14/4-1/2)*100}}} = 28.5 cm^2   (rounded).    <U>ANSWER</U>
</pre>

Solved.