Di hitung keliling dan luas pakai cara no ngasal ya soal ada di atas
a. L = ½ × a × t
=½ × 18 × 10
= 9 × 10
= 90 cm²
b. L = ½ × a × t
= ½ × 25 × 15
= 12,5 × 15
= 187,5 cm²
c. L = ½ × a × t
= ½ × 7 × 5
= 3,5 × 5
= 17,5 cm²
d. L = ½ × a × t
= ½ × 8 × 12
= 4 × 12
= 48 cm²
e. L = ½ × a × t
= ½ × 30 × 14
= 15 × 14
= 210 cm²