conversations.from: human
conversations.value: The perimeter of a triangle is 160 cm. If two of the sides are 40 cm and 50 cm, calculate the length of the third side?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: To get the perimeter, you add all the sides o the triangles, so the first two sides add up to 40+50 = 90 cm.
  If the perimeter of the triangle is 160, the remaining side is 160-90 = 70 cm.