kkk jawaaab tolong yy penting

Luas permukaan prisma :
= 2(luas alas) + (Keliling alas x tinggi)
= 2( (6+12) x 5 / 2) + ( (12+6+5+5) x 15 )
= 2( 18 x 5 / 2 ) + ( 28 x 15)
= 2( 45 ) + 420
= 90 + 420
= 510 cm²