Macmillan Learning Ecologists surveying a location often need to calculate the area of irregular regions. (For example, they may need to find the area of the home range of a marked animal with known multiple locations.) This calculation is done by recording certain lengths and angles associated with the region. An example of such a region is shown in the figure. The lengths are measured in meters. 110 A a b D F 70 C Macmillan Learning 40 20 200 Find the unknown sides and angles in the figure. (Use decimal notation. Give your answers to one decimal place where needed. Include the degree symbol in your answers where needed.) a m C m