Answer:
or 37.70 (rounded)
Explanation:
To work this out you would first need to work out the area of this circle. You can do this by multiplying pi by the radius of 4 squared, this gives you 50.27 or
.
Then in order to work out the area of this part of the circle you would have to divide the area 50.27 or 16pi by 4, this gives you 4 pi or 12.57. This is because the angle of the missing part is 90 degrees or a right angle, and because 360 divided by 4 is 90 this meant that the question is asking to work out
of a circle and so by dividing it by 4 we are working out the area of one quadrant.
Then the final step is to multiply 4 pi or 12.57 by 3, this gives you 12
and 37.70.
1) Multiply pi by 4 squared.
![\pi*4^(2) =16\pi or 50.27](https://img.qammunity.org/2021/formulas/mathematics/high-school/e49uykeggybb46nelgphyl9ohxzvncrjig.png)
2) Divide 50.27 by 4.
![16\pi or 50.27 /4=4\pi or 12.57](https://img.qammunity.org/2021/formulas/mathematics/high-school/kgr3wn7ofocyhneicu3kjbzcxpjyov7l1o.png)
3) Multiply 12.57 by 3.
![12.57*3=12\pi or 37.70](https://img.qammunity.org/2021/formulas/mathematics/high-school/hzzm4eny72mxgvo0q6yl9fyqn790ehw0en.png)