The teacher presents an animated film in which a situation that poses difficulties in determining the amount of material to be used is shown. We intend to maintain a television antenna at a height of ten meters. In order to make sure it stays still and doesn’t fall, it will be held using three cables. It is necessary to buy the exact cable quantity to hold the antenna; therefore it is necessary to know the length of each segment. How is each segment measured if the pole must remain standing? The question remains open with the intention of opening the content development.