Rectangles, arches, and triangles are the most common shapes used to build big structures. What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable shape.
Click through the slideshow to see some different ways these shapes can be sorted. Here the shapes are sorted into small shapes and big shapes. Click next to see another way to sort them.
Rectangles, arches, and triangles are the most common shapes used to build big structures. What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable shape.
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