Question

aria unui triunghiul echilateral cu latura de 2radical din 5este de ..cm?​

Answer 1

Aria la triunghi echi=lat^2rad3/4

=(2rad5)^2rad 3/4

=4*5rad3/4

=20rad3/4

=5rad3 cm

Answer 2

Răspuns:

$aria = {l}^{2} \frac{ \sqrt{3} }{4} \\ = {(2 \sqrt{5)} }^{2} \times \frac{ \sqrt{3} }{4} \\ {2}^{2} \times 5 \times \frac{ \sqrt{3} }{4} = \\ = 4 \times 5 \times \frac{ \sqrt{3} }{4} = \\ 5 \sqrt{3}$