Find the centre of mass of a uniform triangula lamina.

Explanation

To find the center of mass of a uniform triangular lamina, we can follow these steps:

### Step 1: Understand the Geometry of the Triangle
We start by considering a uniform triangular lamina with vertices A, B, and C. For simplicity, we can place the triangle in a coordinate system. Let’s assume:
- Vertex A is at (0, 0)
- Vertex B is at (b, 0)
- Vertex C is at (c, h) where c is the x-coordinate of vertex C and h is the height of the triangle.

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