Page 211 - Kles7_buku matematika _Semester 2
P. 211
Alternatif
Penyelesaian
a. AB = AD BC = DC
AB = 10 cm, maka, BC = 17 cm, maka,
AD = 10 cm BC = 17 cm
2
b. BE = AB + AE 2
2
= 10 − 6 2
= 100 36
−
= 64
BE = 8 cm
sehingga BD = 2 × BE
= 2 × 8
BD = 16 cm
2
EC = BC − BE 2
2
= 17 − 8 2
= 289 64
−
= 225
EC = 15 cm
AC = AE + EC
= 6 + 15
= 21 cm
202 Kelas VII SMP/MTs Semester 2
