ayok, bantu saya. sekalian kamu belajar

alas berbentuk persegi
k = s × 4
40 = s × 4
s = 40/4
s = 10 cm

t² = 13²-5²
t² = 169-25
t² = 144
t = √144
t = 12 cm

V = ⅓ × L alas × t
V = ⅓ × (10×10) × 12
V = 4 × 100
V = 400 cm³ (a)

semoga membantu

alas persegi
k=s x4
40=sx4
s=40:4=10cm


t2=13pangkat 2 -5 pankat 2
t2= 169-25
t2=144 diakar pangkat 2
t= 12cm

v=1/2x L alas x t
v= 1/2x (10x10) x12
v= 4 x 100
v = 400 cm3

maaf kalo salah.....