I am uncertain I did this problem correct.
A sprinkler sprays water over a distance of 40' at a angle of 155 deg. What is the area in square feet covered.Area of a circle is (pi)(r^2). The only formula that I have been able to get a value in the listed answers is A=1/2(155 deg.)(40)^2. I suspect I am missing something simple?
My take on the problem is that 155 deg. is the angle at which the sprinkler sprays water from the intersection of the x,y point. It is possible that my interpretation of the problem is incorrect and the correct formula is the area of a sector formula. This formula does provide a answer within the options for a answer.