Final answer:
To find the greatest possible angles of each piece, divide the strings into equal lengths using the greatest common divisor (GCD) of their lengths. Then calculate the angles for each piece.
Step-by-step explanation:
To find the greatest possible angles of each piece, we need to divide each string into equal lengths. Let's assume that all three strings are cut into n equal lengths. The length of each piece for the first string is 78/n cm, for the second string is 117/n cm, and for the third string is 351/n cm.
Since we want to find the greatest possible angles, we should divide each string into the same number of equal lengths.
Let's assume the greatest common divisor (GCD) of the lengths of the three strings is d cm. We can set up an equation: d = GCD(78, 117, 351). Once we find the value of d, we can divide each string by d to obtain the equal lengths.
For example, if we find that the GCD is 39, we can divide the first string into 2 cm pieces (78/39 = 2 cm), the second string into 3 cm pieces (117/39 = 3 cm), and the third string into 9 cm pieces (351/39 = 9 cm).
This will ensure that each piece has an equal length and allow us to calculate the greatest possible angles for each piece.