Question

This is my question ​

Answer 1

1. DB=16

2. AC=15

4.BC=20

5. BC=20

Explanation:

1. BD/CD=CD/AD ⇒ x/12=12/9 ⇒ x=
`(12*12)/(9)`=16

2.BC=
`\sqrt{12^(2)+x^(2) }`=
`√(144+256)`=20

AC/CB=AD/CD ⇒ AC=
`(9*20)/(12)`=15

4.BC/CA=CD/AD ⇒BC=
`(15*12)/(9)`=20

5. BC=
`\sqrt{12^(2) +x^(2) }`=20