In triangle AB, the angle is 90 degrees AC = 20, tg A = 0.9. Find BC.
| May 25, 2021 | education
Since, by condition, the angle ACB = 90, then the triangle ABC is rectangular.
In a right-angled triangle, the tangent of its acute angle is the ratio of the length of the opposite leg to the length of the adjacent leg.
tgBAC = BC / AC = 0.9.
BC = AC * 0.9 = 20 * 0.9 = 18 cm.
Answer: The length of the BC leg is 18 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.
