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In the diagram, how many of the shapes are triangles?

Pick one

A $4$ B $5$ C $6$ D $7$ E $8$

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Official solution

In the diagram, there are $3$
columns containing triangles that each contain $2$ triangles.

So, there are $3\times2=6$
triangles.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.