Jawab:
D. 180
Penjelasan dengan langkah-langkah:
ΔABC adalah segitiga sama kaki, sehingga < ABC = < ACB = 55°
< BAC + < ABC + < ACB = 180°
x° + 55° + 55° = 180°
x° + 110° = 180°
x° = 70°
sudut ( y + 15°) dan sudut ABC saling berpelurus :
y° + 15° + 55° = 180°
y° + 70° = 180°
y° = 110°
x + y = 70 + 110 = 180
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Jawab:
D. 180
Penjelasan dengan langkah-langkah:
ΔABC adalah segitiga sama kaki, sehingga < ABC = < ACB = 55°
< BAC + < ABC + < ACB = 180°
x° + 55° + 55° = 180°
x° + 110° = 180°
x° = 70°
sudut ( y + 15°) dan sudut ABC saling berpelurus :
y° + 15° + 55° = 180°
y° + 70° = 180°
y° = 110°
x + y = 70 + 110 = 180