In triangle ABC, side AB is 27cm, and it is 3 times larger than side BC. Find the length of the side AC

In triangle ABC, side AB is 27cm, and it is 3 times larger than side BC. Find the length of the side AC if the perimeter of triangle ABC is 61 cm.

Let us calculate the length of the BC side if it is 3 times shorter than the length of the AB side:
27: 3 = 9 cm.
The perimeter of a triangle is equal to the sum of dyn of all its sides.
We calculate the length of the AC side, for this we subtract the lengths of the sides AB and BC from the perimeter of the triangle:
61 – (27 + 9) = 61 – 36 = 25 cm.
Answer: The length of the speaker side is 25 cm.