# The perimeter of the ABC triangle is 190cm. The AB side is 80cm, the BC side is 2 times smaller. Find the side of the speaker?

September 12, 2021 | education

| 1. To solve the problem, first we find the side BC, which is 2 times smaller than AB:

80 cm / 2 = 40 cm.

2. Subtract from the perimeter of the triangle the lengths of the sides AB and BC, we get the length of the AC side:

190 cm – 80 cm – 40 cm = 190 cm – 120 cm = 70 cm.

Answer: The side of the speaker is 70 centimeters.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.