Minta Tolong dibantu yaa kak, aku gak ngerti caranya gimana

1/2xaxtxtp
itu cara nya

t trapesium = akar (17^2 - (20-12)^2)
= akar (17^2 - 8^2)
= akar (289 - 64)
= akar 225
= 15 cm
V prisma =( 1/2×(20+12)×15)×10
= 1/2×32×15×10
= 2400 cm^3 (A)