Răspunsuri

2014-01-17T23:16:23+02:00
2014-01-17T23:17:02+02:00
A triunghi echilateral = l² \sqrt{3} \ 4
h triunghi echilateral =  l \sqrt{3} \ 2

A patrat = l²
d = l \sqrt{2}
P = 4·l

Lcerc = 2 \pi r
Adisc =  \pi
Asector(AOB) =  \pi r²·n\360°

Aparalelogram = b·h = AB· sin A
P = 2AB + 2BC

Atrapez = (B+b)·h \ 2
linia mijlocie ii trapez = (B+b)\2
P = AB + BC + CD + AD

 Aromb = d₁·d₂\2 = l²sin A = B·h
P= 4l