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-luas 2 segitiga kanan& kiri : 18.20/2 = 180 x 2 = 360
20 nya Dari 16.16+12.12 = 256+144 =√400= 20 , dikali 2 karna msing" 2 sgitiga sama
-luas 2 segitiga dpn & blkg : 15.32/2 = 240 x 2 = 480
hasilnya = 576+360+480 = 1416
4. luas alas&tutup prisma : 16x12/2 = 96 x 2 = 196
luas persegi panjang = 10x12= 120x4=480
hasilnya 192+480 = 672