Tolong dijawab beserta caranya ​

ABC= AB × BC × ½

= 6 × 3 × ½

= 18 × ½

= 9cm²

ABD = AB × BD × ½

= 6 × 9 × ½

= 54 × ½

= 27cm²

ADC = ABD – ABC

= 27cm² – 9cm²

= 18cm²