bantu jawab soal nomor 6. mohon secepatx ☺

1. DB²=AB²- AD²
DB =√13²- 5²
DB =√169-25
DB = √144
DB = 12 cm
2. DE= AE-AD
= 13-5
= 8 cm
3. EC²=DE²+DC²
=√8²+6²
=√64+36
=√100
=10