Tentukan panjang ML

ML² = KN² - KO²

ML² = 15² - 9²

ML² = 225 - 81

ML² = 144

ML = √144

ML = 12 cm

Keliling

= KL + ML + MN + KN

= (9 + 18) + 12 + 18 + 15

= 27 + 30 + 15

= 27 + 45

= 72 cm

Luasan

= ½ × (KL + MN) × ML

= ½ × (27 + 18) × 12

= 45 × 6

= 270 cm²

Tentukan panjang AB

AB² = AO² + OB²

AB² = 9² + 12²

AB² = 81 + 144

AB² = 225

AB = √225

AB = 15 cm

Keliling

= 4AB

= 4(15 cm)

= 60 cm

Luas

= ½ × AC × BD

= ½ × 18 × 24

= 9 × 24

= 216 cm²

Tentukan panjang ED

ED² = AD² - AE²

ED² = 13² - 5² ------> AE = (AB - DC)/2

ED² = 169 - 15

ED² = 144

ED = √144

ED = 12 cm

Kelililing

= AB + BC + CD + AD

= 20 + 13 + 10 + 13

= 30 + 26

= 56 cm

Luas

= ½ × (AB + CD) × ED

= ½ × (20 + 10) × 12

= 30 × 6

= 180 cm²