" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Verified answer
Bab LingkaranMatematika SMP Kelas VIII
jari-jari = BC = CD = r
AD² + CD² = AC²
10² + r² = (AB + BC)²
100 + r² = (7 + r)²
100 + r² = 7² + 2 . 7 . r + r²
100 + r² = 49 + 14r + r²
100 - 49 = 14r + r² - r²
14r = 51
r = 51/14
jawabannya C
Verified answer
Materi: LingkaranACD adalah segitiga siku2 shg berlaku
AC^2 = AD^2 + CD^2
(7+r)^2 = 10^2 + r^2
49 + 14r + r^2 = 100 + r^2
14r = 51
r = 51/14 ( C)