So each of the rays of an angle are considered one of its sides. When we're working with circles, there are two key angles to know: central angles and inscribed angles. Geometry Unit 10 Answer Key Section 10.1 1. Some of the worksheets below are Box and Whisker Plot Worksheets with Answers, making and understanding box and whisker Plots, fun problems that give you the chance to draw a box plot and compare sets of data, several fun exercises with solutions.