We will assume that the side of triangle AB is equal to x, then the side of BC will be (2 * x). The perimeter is equal to the sum of the three sides, it is 19.3 cm.We get the equation:
x + 2 * x + 7.9 = 19.3;
3 * x = 11.4;
x = 11.4 / 3;
x = 3.8 cm – the length of the side AB.
Determine the length of the side BC:
BC = 2 * x = 2 * 3.8 = 7.6 cm.
3.8 + 7.6 + 7.9 = 19.3.
Answer: The side of triangle BC is 7.6 centimeters.
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