Bantu jawab 2 soal di atas menggunakan cara

No. 8

P. sebenarnya
= 5 × 300 = 1500 cm = 15 m

l. sebenarnya
= 2 × 300 = 600 cm = 6 m

Keliling
= 2 (p + l)
= 2 (15 + 6)
= 2 × 21
= 42 m ✔

No. 9

p. sebenarnya
= 6 × 2.500
= 15.000 cm
= 150 m

l. sebenarnya
= 3 × 2.500
= 7.500 cm
= 75 m

Luas
= p × l
= 150 × 75
= 11.250 m^2 ✔