tolong dijawab dengan cara

diketahui :
CD = 12 cm
tinggi = 15 cm
BC = 17 cm
harga per 1 cm² = Rp700,00
ditanya :
harga permukaan meja

jawab :
c² = √f²-b²
=√17²-15²
=√289-225
=√64
=8 cm
panjang FB = panjang AE = 8 cm

panjang AB = 8 + 12 + 8 = 28 cm
Luas trapesium ABCD = (AB+CD) × t ÷ 2
= (28+12) × 15 ÷ 2
= 40 × 15 ÷ 2
= 300 cm²

harga 1cm² = Rp700,00,
harga 300 cm² = Rp700,00, × 300 = Rp210.000,00