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Dia: Based Vector drawing program
Dia is a vector based drawing program, with strong support for making diagrams (graphs). Graphs are a series of "objects" connected to "arrows".
Dia has a library of ready-made object shapes in many different fields: flow …
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Signs of unfolding
Digital instruction to a result of a sloping pipe drawing. Slide presentation step by step how the unfolding should be drawn.
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Downloadable resource (3)Teacher