Question

Va rog, repede!!!

Dau coroana!!!!!!​

Answer 1

Răspuns:

a) Aria este

$\frac{32 \times 80}{2} = 32 \times 40 = 1280 \: mm {}^{2}$

b) Aria este:

$\frac{ \sqrt{3} \times 3 \sqrt{3} }{2} = \frac{3 \times 3}{2} = {4.5mm }^{2}$

c)

$3 \sqrt{2} + \sqrt{2} = 4 \sqrt{2}$

Aria este:

$\frac{4 \sqrt{2 } \times 3.5 \sqrt{2} }{2} = 2 \times 3.5 \times 2 = 14cm {}^{2}$