The figure shown on the right illustrates that the numbers 1, 2, 3, 4, 5, and...

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The figure shown on the right illustrates that the numbers 1, 2, 3, 4, 5, and 6 can be placed around a triangle in such away that the three numbers along any side sum to 9, which is shown in the circled number inside the triangle. Arrange the numbers 1, 2, 3, 4, 5, and 6 to give the sums circled in the next three figures. (a) Determine the numbers for a, b, c, and d for the triangle shown to the right. a= , b = , c = | , d = | (6) 1 5 6 (10) b The figure shown on the right illustrates that the numbers 1, 2, 3, 4, 5, and 6 can be placed around a triangle in such away that the three numbers along any side sum to 9, which is shown in the circled number inside the triangle. Arrange the numbers 1, 2, 3, 4, 5, and 6 to give the sums circled in the next three figures. (a) Determine the numbers for a, b, c, and d for the triangle shown to the right. a= , b = , c = | , d = | (6) 1 5 6 (10) b