In triangle ABC AC = BC = 2√3, angle С = 120⁰. Find the length of side AB
| September 27, 2021 | education
Let us determine the length of the side AB by the cosine theorem.
AB ^ 2 = AC ^ 2 + BC ^ 2 – 2 * AC * BC * Cos120 = 12 + 12 – 2 * 2 * √3 * 2 * √3 * (-1/2) = 24 + 12 = 36.
AB = 6 cm.
Answer: The length of the AB side is 6 cm.
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.
