Peter has three pieces of wood. Board A is 3 inches long, board B is 8 inches long, and board C is 13 inches long. If the full length of each board is used, can the three pieces of wood be placed together to form a triangle?
To form a triangle with three sides, the sum of the lengths of any two sides must be greater than the length of the third side.
In this case, the sum of the lengths of boards A and B is 3 + 8 = 11 inches, which is greater than the length of board C (13 inches). Therefore, boards A and B can be used to form one side of the triangle, while board C can be the third side.
Therefore, the three pieces of wood can be placed together to form a triangle.