Step 1: Analyze the Platonic Solid.
The given face of the platonic solid is a triangle, and since all faces are congruent, each face is a triangle. The solid in question is likely a regular tetrahedron, where each face is an equilateral triangle.
Step 2: Count the faces.
A tetrahedron has 4 faces. Since each face is a triangle, the total number of triangles visible on all faces is:
\[
\text{Total number of triangles} = 4 \text{ faces} \times 1 \text{ triangle per face} = 4.
\]
Final Answer:
\[
\boxed{4}
\]