a right cone has a base diameter of 2 feet and a slant height of 7 feet. calculate the surface area of this cone to the nearest square foot.
https://www.google.com.au/search?q=surface+area+of+a+cone&ie=utf-8&oe=utf-8&gws_rd=cr&ei=dWHsVLHGMY7f8AXlloHgAw
