In a right-angled triangle ABC, angle C = 90 B = 45 AC = 12cm what is the side length BC?
| September 23, 2021 | education
The tangent of an acute angle of a right-angled triangle is equal to the ratio of the opposite leg to the adjacent leg.
tgA = BC / AC.
BC = AC * tg45.
BC = 12 * 1 = 12 cm.
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