tolong Ya kak Bsok Mau Dikumpul

bangun ruang Prisma
2a)  luas = 2(luas alas) + (keliling alas x tinggi prisma)
L= 2 (1/2)(axb) + (a+b+c)(t)
L = axb + (a+b+c)(t)
L = (3x4)+ (3+4+5)(7)
L = 12 + 12(7)
L = 12 + 84
L = 96 cm²

2b)
a= 5, b = 12,
c² = a²+b² --> c² = 5²+12²= 25+144 = 169
c = √169 = 13

Luas prisma = 2 x luas alas + keliling alas x tinggi prisma
L = 2 x (axb)/2  + (a+b+c)t
L = a x b + (a+b+c)t
L = (5x12) + (5+12+13)(10) = 60  +30(10)
L=  60 + 300
L = 360  dm²

3. Prisma trapesium
L = 2 luas alas + keliling x tinggi prisma
L = 2 (1/2 (2+10)x 12) + (12+10+14,4+2)(15)
L = 12(12) + (38,4)(15)
L = 144+ 576
L = 720 cn²

b.
L = 2 luas alas +  keliling alas x tinggi
L = 2 [1/2 (5+11)4] + (5+11+5+5)(10)
L = (16)(4) + (26)(10)
L = 64 + 260
L= 324 cm²

4. Prisma
Luas alas = A = 14 cm²
Jumlah Luas bidang tegak = J = 20 cm²
Luas tutup B = 14 cm²

Luas prisma = A + J + B = 14 +20+14 = 48 cm²

thanks kak bb45 makasih  banget atas bantuanya