The radius of the circle for this problem is 3.5 cm. I need the equation of the circle, and help with this

2. Choose a point on the circle in the second quadrant that is not on the axes. . Measure the coordinates of the points in centimeters and write them down. . Show that the coordinates you measured satisfy the equation you built in # 1. 3. Use the string to measure the arc length along the circle to your chosen point by laying the string along the circle starting at the 3 o'clock position, going counter-clockwise and ending at your point. . Write down the arc length and include units. . What is the radian measure of the angle corresponding to this arc? Write it down. . Use the protractor to measure the same angle in degrees. Write it down. 4. Using your calculator, evaluate cosine and sine of your angle. . Write down your results. . Multiply your answers by the radius, square the values you obtained and add them together. Write down your answer and include units