Penjelasan dengan langkah-langkah:
cari panjang BD :
Segitiga ACD memiliki sudut 30°, 60°, dan 90° maka :
AD : BD : AB = 1 : √3 : 2
AD : BD : 8 = 1 : √3 : 2
BD/AB = √3/2
BD/8 = √3/2
BD × 2 = 8 × √3
2BD = 8√3
BD = (8√3)/2
BD = (8√3)/2 × 2/2 = (16√3)/4 = 4√3 cm
cri pnjg AD :
AD = √(AB² - BD²)
AD = √(8² - (4√3)²)
AD = √(64 - 16(3))
AD = √(64 - 48)
AD = √(16)
AD = 4 cm
maka tinggi segitiga ABC adlh 4 cm
lanjutt
cari pnjng sisi CD :
CD : AD : AC = 1 : √3 : 2
CD : 4 : AC = 1 : √3 : 2
CD/AD = 1/√3
CD/4 = 1/√3
CD × √3 = 4 × 1
CD = 4/√3
CD = 4/√3 × √3/√3 = 4√3/3 = 4/3√3 cm
pnjng sisi CD adlg 4/3√3 cm
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
Penjelasan dengan langkah-langkah:
cari panjang BD :
Segitiga ACD memiliki sudut 30°, 60°, dan 90° maka :
AD : BD : AB = 1 : √3 : 2
AD : BD : 8 = 1 : √3 : 2
BD/AB = √3/2
BD/8 = √3/2
BD × 2 = 8 × √3
2BD = 8√3
BD = (8√3)/2
BD = (8√3)/2 × 2/2 = (16√3)/4 = 4√3 cm
cri pnjg AD :
AD = √(AB² - BD²)
AD = √(8² - (4√3)²)
AD = √(64 - 16(3))
AD = √(64 - 48)
AD = √(16)
AD = 4 cm
maka tinggi segitiga ABC adlh 4 cm
lanjutt
cari pnjng sisi CD :
CD : AD : AC = 1 : √3 : 2
CD : 4 : AC = 1 : √3 : 2
CD/AD = 1/√3
CD/4 = 1/√3
CD × √3 = 4 × 1
CD = 4/√3
CD = 4/√3 × √3/√3 = 4√3/3 = 4/3√3 cm
pnjng sisi CD adlg 4/3√3 cm