Question

cual es el area de un circulo de 5 cm de radio

Answer 1

Area de circulo = π *r²    ( π= 3,14      r = radio = 5cm )
A = 3,14 *5²cm²
A = 3,14*25cm²
A = 78,5cm²
El area del circulo es = 78,5cm²

Answer 2

$Area \ circulo = \pi *r^2 \\ \\ radio = 5cm \\ \\ Area \ circulo = \pi *(5cm)^2 \\ \\ Area \ circulo = 3,14 *25cm^2 \\ \\ Area \ circulo = 3,14 *25cm^2 \\ \\ \boxed{Area \ circulo = 78,5cm^2 }$

Espero que te sirva, salu2!!!!