Răspunsuri

2014-05-23T17:01:20+03:00
2014-05-23T18:19:53+03:00
aria totala=aria laterala+ aria bazei
aria laterala=perimetrul bazei x apotema piramidei/2
=6x4)x12/2
=144
aria bazei =l²=6²=36
aria torala=144+36
=180 cm