<span>draw the figure first (label everything you know). add two altitudes, from the endpoints of the top base you know that the bottom base is now divided 5-6-5 using that and the diagonal, pythagorean theorm can be used to find the altitude: (c^2)-(a^2)=(b^2) (12^2)-(11^2)=b^2 b^2=23 altitude is about 4.8</span>
