Question

Doar cerinta din poza. Va rog repede!!!!!​

Answer 1

Salut!

∆ ABC

AB = 12 cm

BC = 16 cm

CC' = 8 cm

CC' _|_ AB

AA' _|_ BC

a)

$\bf {A_{ABC} = \frac{baza \times inaltime}{2} } = \frac{AB \times CC'}{2} = \frac{ \not12 \times 8}{ \not2} = 6 \times 8 = 48 {cm}^{2} ✓$

b)

$\bf{A _{ABC} = \frac{BC \times AA'}{2} }$

==> 48 • 2 = 16 • AA'

96 = 16 • AA'

AA' = 96 : 16

AA' = 6 cm✓