a: draw a rectangle an label one side 80 and the other 115
b: 1560 Yards
The line is right in the middle of 100 and 110 degrees so the answer should be 105 degrees. This tool is called a protractor. :)
Answer: the circumference is the perimeter of a circle or ellipse. That is, the circumference would be the arc length of the circle, as if it were opened up and straightened out to a line segment. More generally, the perimeter is the curve length around any closed figure.
C is the right answer because the period should be pi/(1/3), so the answer is 3pi
