A computer model which generates angles in radians. Students can be asked to estimate the angle, arc length and sector area before answers are revealed. Please follow these guidelines to use this resource: When opening, click "Enable content". Go to File - Options - Formulas and set calculation options to "Manual" and make sure the "Enable iterative calculation box" is checked. This document should be used in conjunction with the related lesson presentation, lesson plan, activity sheet and computer model files, which are also available for download. Detailed teacher's notes and homework activity sheets are also available. Any videos referenced in this document are not available for download but can be provided on request. Please email Aspen Resources if video content is required. This file and its content are to be used by the party that has paid for and downloaded the document only and must not be disseminated to other parties without the consent of Aspen Resources. Aspen Resources is a provider of high quality teaching resources. With a growing reputation for excellence, Aspen Resources is becoming a byword for progress in education. Make Aspen Resources your preferred provider for educational content.