Question

Calculati folosind formula, lungimea cercului care are raza: a) 5 cm b) 7,5 cm c)10 supra pi cm
Ajutooor va roog dau coroana

Answer 1

Răspuns:

L=2π·r

L=5·2π=>L=10π=>L≈10·3,14=>L≈31,4 cm

L=7,5·2π=>L=15π cm=>L≈47,1 cm

L=10/π·2π=>L=20cm

Answer 2

$L = 2\pi *r\\\\a)~L=2\pi *5 = 10\pi ~cm\\\\b)~L=2\pi *7,5=15\pi ~cm\\\\c)~L=2\pi *\frac{10}{\pi }=20~cm$