mohon secepatnya pakai cara ya kakak kakak

DE^2 = CD^2 - CE^2
DE^2 = 10^2 - 6^2
DE^2 = 100 - 36
DE^2 = 64
DE = 8

BC = AD + 2DE
BC = 6 + 2 × 8
BC = 22

L = 1/2 × (a + b) × t
L = 1/2 × (BC + AD) ×CE
L = 1/2 × (22 + 6) × 6
L = 84