tolong dong jwbpin besok di kumpul

1. AD² = (20-12)² + 6²
AD² = 8²+6²
AD² = 64+36
AD² = 100
AD= √100
AD= 10 cm

keliling = 20+12+6+10 = 38 cm

2. cari tinggi
= 240 = 16 × x
= x = 240:16
= x = 15

cari sisi FB
FB² = 17² - 15²
FB² = 289 - 225
FB² = 64
FB = √64
FB = 8

cari sisi AE
AE² = 25²-15²
AE² = 625 - 225
AE²= 400
AE =√400
AE = 20

maka,
alas = AE +EF + FB = 20+16+8 = 44
tinggi = 15 cm

jadi,
luas = 1/2 × (16+44) × 15
luas = 1/2 × 50 × 15
luas = 25× 15
luas = 375 cm²