Sliding a shape means moving it in a certain direction without rotating or flipping it. This kind of movement is called a translation.To slide the triangle 3 cells to the left, follow these steps:Start with the original position of the triangle. Take note of where each corner or vertex of the triangle is located on the grid.Move each point of the triangle 3 cells to the left. This means subtracting 3 units from the x-coordinate of each point, while keeping the y-coordinate the same.