Question

Pada gambar diatas panjang AB 12 cm dan BC 15 cm.AD adalah

Answer 1

Diket :
AB = 12 cm
BC = 15 cm

ditanya : AD...?
jaawab :

AC = √(BC^2 - AB^2)
~~ = √(15^2 - 12^2)
~~ = √(225 - 144)
~~ = √(81)
~~ = 9 cm

• (AB × AC)/2 = (BC × AD)/2
• AD = (AB × AC)/BC
• AD = (12 × 9)/15
• AD = (4 × 9)/5
• AD = 36/5
• AD = 7,2 cm