One side of a triangle is 6 cm; the other side is 4 cm. The perimeter of the triangle is 19 cm. What is the third side of the triangle.
The perimeter of a triangle is equal to the sum of all its sides. We know the two sides and the perimeter, in order to find its third side, we need to subtract the sum of the two sides from the perimeter.
19 – 6 – 4 = 9 cm.
Answer: The length of the third side of the triangle is 9 cm.
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