nomor 35 caranya gmn ya

L kubus tnp tutup = 5 × s x s
= 5 × 20 × 20
= 2000 cm^2
T segitiga = akar (rusuk tegak^2 - (1/2 × s )^2)
= akar (26^2 - (1/2 × 20)^2)
= akar (676 -100)
= akar 576
= 24 cm
L limas tegak = 4 × ( 1/2 × s × T)
= 4 × ( 1/2 × 20 × 24)
= 4 × 240
= 960 cm^2
L seluruh permukaan bangun = 2000 + 960
= 2960 cm^2 (D)