Question

4, 5 si 6 va rog......

Answer 1

$\it 6)\ tgB=tg\dfrac{\pi}{4}=1$

$\it tgB =\dfrac{AC}{AB} \Longrightarrow 1 =\dfrac{6}{AB} \Longrightarrow AB = 6 .$

Answer 2

4)
100:100=1%
1x20=20 lei
100+20=120 lei
Obiectul va costa 120 lei