# The perimeter of the triangle is 17 / 8m, one side is 3/4m, the other is 4/7m. Find its third side.

December 31, 2020 | education

| Decision:

P (triangle) = a + b + c

P = 17 / 8m

a = 3 / 4m

b = 4 / 7m

c-? m

c = P-a-b = 17 / 8-3 / 4-4 / 7 = 17 / 8-6 / 8-4 / 7 = 11 / 8-4 / 7 = 77 / 56-32 / 56 = 45/56 (m)

Answer: 45 / 56m