TLF ID L1923
Build bridges by adding triangular sections (each made up of three beams). Make bridges in order of increasing widths (increasing by at least one section each time). Examine a table and graph of the total number of beams used in bridges of different sizes. Predict the number of beams needed to build a wider span. Describe the number pattern. This learning object is the second in a series of five objects that progressively increase in difficulty.