find the lateral area of a cone with a radius of 7 ft and a slant height of 13 ft use 3.14 and round to the nearest tenth
439.6
324.5
571.5
285.7
base of triangle = 2 pi R = 2 * 3.14 * 7 = B
1/2 * B * 13 = 285.7
439.6
324.5
571.5
285.7
1/2 * B * 13 = 285.7