Question

the perimeter of an equil
etral triangle is 45 cm find its area​

Answer 1

$Perimter \: =sum \: \: of \: \: all \: lengths \: \:\\ of \: \: sides \: \: of \: \: triangle \\ ⇒ Perimeter \: \\ = \: 3a \: (a= side \: of \: triangle ) \\ ⇒45=3a \\ ⇒a=15cm.$