K.G.B.6

[Tracy]

I was wondering if  you could help me in regards to a quick clarification on CCSS.Math.Content.K.G.B.6 Compose simple shapes to form larger shapes. For example, “Can you join these two triangles with full sides touching to make a rectangle?”

Does this mean that the two shapes that are being used need to form a new shape?  What I mean by that, is do the lines need to touch or can a circle be placed on top of a square, resulting in a new figure, but not a new shape?   I believe at this grade level, the intent was to really create a new shape like the example above, but we want to make sure we are understanding this correctly

[Cathy Kessel]

Thanks for this comment. Yes, the composing shapes are adjacent not superimposed.

I don’t know if you’ve looked at the Progressions, but you might check out the K–6 Geometry Progression, http://ime.math.arizona.edu/progressions/

There’s a discussion of composing shapes to build pictures and designs on p. 7, but I see that the discussion might say more about other shapes before it gets into pictures and designs.

There’s an illustration of shapes composing another shape on p. 10.

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