Chapter 6 Dimensions Radius Dimension ­ This is a dimension that measures the radius of a circle or an arc (Figure 6.5). Figure 6.5 ­ Radius dimension Keyboard: Type in dim, press Enter, type in rad, press Enter Cascading menus: Dimension Radius Toolbar icon: Dimension toolbar Ribbon: Annotate tab Dimension Radius Step 1 Create a small to medium size circle as seen in Figure 6.5. Then begin the radius dimension command via any of