1. The problem statement, all variables and given/known data A circular disc has a radius of (10 +/- 0.2)cm. Determine the percentage error in the determination of its circumference. 3. The attempt at a solution I know that percentage error is found by absolute error divided by measurement x 100. The absolute error here is 0.2cm, and the measurement is 10cm. But what do I have to do with circumference?