Tolong dibantu kakak

Jawaban:

Materi Kesebangunan

1.) a/5 = 4/7

7a = 4 × 5

7a = 20

a = 2,85cm

2.) BD = √AB – AD

= √25² – 20²

= √625 – 400

= √225

= 15cm

CD/AD = BD/BD

CD/20 = 15/15

CD/20 = 1

CD = 20cm