Is this shape 2-dimensional or 3-dimensional? Why?
2D; it is flat.
What shape is this? What shapes is it made out of?
It is a rectangle; it is made out of squares.
What other shapes could be put together to make this rectangle?
Answers vary and may include triangles, other rectangles, etc.
What tools could you use to measure how long this rectangle is?
Answers vary and should include rulers and tiles.
Cesar wants to measure the length using tiles. What instructions would you give him?
Lay the tiles right next to each other. Don't overlap them and don't leave gaps. Start at one end and count how many tiles it takes to get to the other end.
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