Question

Perhatikan gambar di samping ∆ABC siku-siku di A, panjang BD=7cm dan DC=4cm. Hitunglah
a. Panjang AB
b. Panjang AD
c. Panjang AC
​

Answer 1

BD = 7 cm

DC = 4 cm

BC = 7 + 4 = 11 cm

a. AB² = BD x BC

= 7 x 11

= 77

AB = √77 cm

b. AD² = BD x DC

= 7 x 4

= 28

AD = √28 = 2√7 cm

c. AC² = CD x BC

= 4 x 11

= 44

AC = √44 = 2√11 cm