Salut!
∆ ABC
AB = 12 cm
BC = 16 cm
CC' = 8 cm
CC' _|_ AB
AA' _|_ BC
a)
[tex] \bf {A_{ABC} = \frac{baza \times inaltime}{2} } = \frac{AB \times CC'}{2} = \frac{ \not12 \times 8}{ \not2} = 6 \times 8 = 48 {cm}^{2} ✓[/tex]
b)
[tex] \bf{A _{ABC} = \frac{BC \times AA'}{2} }[/tex]
==> 48 • 2 = 16 • AA'
96 = 16 • AA'
AA' = 96 : 16
AA' = 6 cm✓
