Tolong no 3&4 pake cara please secepatnya besok di kumpul

3. kll = 54
sisi = 54 : 4
= 13.5
luas = s × s = 13.5 × 13.5
= 185.25
4. a. 15 × 8 ÷ 2 = 60
b. 21×20÷2=210
c.6×8÷2=24

3. K = 54 cm
K = 6 × sisi
54 = 6 × sisi
sisi = 54÷6
sisi = 9 cm
L = s×s
L = 9×9
L = 81cm"
"=kuadrat
4. a. L = 1/2×a×t
L = 1/2×8×15
L = 4×15
L = 60cm kuadrat
b. L = 1/2×20×21
L = 210 cm kuadrat
c. L = 1/2×6×8
L = 24 cm kuadrat


kalo salah maapin^^