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1. The perimeter of the triangle can be express as follows:

   12b + 11d + 2c

   How to find perimeter of a triangle?

   The perimeter of a figure is the sum of the whole sides of the figure.

   A triangle has three sides. Therefore, the perimeter of a triangle is the sum of the three sides.

   Therefore, the sides of the triangle are of lengths (2b + 5c) centimetres, (10b + 7d) centimetres, and (4d-3c) centimetres.

   Hence, the perimeter of the triangle can be represented as follows:

   Perimeter of the triangle = 2b + 5c + 10b + 7d + 4d – 3c

   Perimeter of the triangle = 2b + 10b + 7d + 4d + 5c – 3c

   Perimeter of the triangle = 12b + 11d + 2c

   Therefore, the perimeter of the triangle can be express as follows:

   12b + 11d + 2c

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