In triangle ABC, the angle is c = 90 degrees, AC = 10, tgA = 0.8. Find BC.
| April 11, 2021 | education
In a right-angled triangle, the tangent of its acute angle is equal to the ratio of the length of its opposite leg to the length of the adjacent leg.
tgBAC = BC / AC.
BC = AC * tgBAC = 10 * 0.8 = 8 cm.
Answer: the length of the BC side is 8 cm.
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