MrBinfield
Karen Campe@MrBinfield pointy top, square bottom.
@KarenCampe Thats very interesting. When you are saying “pointy top” are you referring to the apex on the pyramids? Tell me more about what you see that makes you say “square bottom.”
@MrBinfield I mean right circle is all pyramids (polygon base, ~ cross-sections, lateral faces are triangles)
Left circle is all prisms (parallel congruent bases, congruent cross-sections, lateral faces rectangles) but I think the student is noticing the square/rectangular base feature of those.
The overlap is a pyramid with a square base, so has both attributes: pointy top and square bottom.
BUT I didn't see the triangular prism in the left circle when I wrote my 1st comment.
That could be a mis-categorization if the student sees the base as "the bottom" and that prism is "lying down".
#geometry #ClassroomMath #MTBoS
Left circle is all prisms (parallel congruent bases, congruent cross-sections, lateral faces rectangles) but I think the student is noticing the square/rectangular base feature of those.
The overlap is a pyramid with a square base, so has both attributes: pointy top and square bottom.
BUT I didn't see the triangular prism in the left circle when I wrote my 1st comment.
That could be a mis-categorization if the student sees the base as "the bottom" and that prism is "lying down".
#geometry #ClassroomMath #MTBoS
@KarenCampe this is an excellent analysis and explanation. I can tell you that the student did not have a misconception about the triangular prism. She had a valid reason that kept in the boundaries of her sorting rule. 😄
@MrBinfield hmmmm... 🤔
@MrBinfield
How about this:
Left circle is a solid that has any face/base that is rectangular.
Right circle is pyramids.
#geometry #ClassroomMath
How about this:
Left circle is a solid that has any face/base that is rectangular.
Right circle is pyramids.
#geometry #ClassroomMath
