Question

18) Encontre a medida AB sabendo que tg
B = 3.

Answer 1

$tg \alpha = \frac{co}{ca}$

$tgb = \frac{9}{cb}$

$3 = \frac{9}{cb}$

3cb=9

cb=9/3

cb=3

hip²=cat²+cat²

AB²=9²+3²

AB²=81+9

AB²=90

AB=√90

AB= 3√10