From the diagrams in the question, there are 3 triangles and 3 circles.
Therefore, for every 1 triangle, there is 1 circle.
Hence, the unsimplified ratio of the triangle to circles is given as 3:3, also written as
[tex]\frac{3}{3}[/tex]
The simplified ratio of the triangle to the circle is therefore
[tex]\begin{gathered} 1\colon1 \\ \end{gathered}[/tex]
