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Perhatikan gambar berikut ini! Besar  adalah ....

Pertanyaan

Perhatikan gambar berikut ini!



Besar angle A adalah ....

  1. 80 degree 

  2. 70 degree 

  3. 60 degree 

  4. 50 degree 

Pembahasan Soal:

table attributes columnalign right center left columnspacing 0px end attributes row cell 2 x degree plus open parentheses 5 x plus 5 close parentheses degree end cell equals cell 180 degree end cell row cell 2 x degree plus 5 x degree plus 5 degree end cell equals cell 180 degree end cell row cell 7 x degree end cell equals cell 175 degree end cell row x equals cell fraction numerator 175 degree over denominator 7 degree end fraction end cell row x equals cell 25 degree end cell end table 

table attributes columnalign right center left columnspacing 0px end attributes row cell angle B end cell equals cell 2 x degree end cell row blank equals cell 2 cross times 25 degree end cell row blank equals cell 50 degree end cell end table 

table attributes columnalign right center left columnspacing 0px end attributes row cell angle C end cell equals cell open parentheses 3 x minus 15 close parentheses degree end cell row blank equals cell 3 open parentheses 25 degree close parentheses minus 15 degree end cell row blank equals cell 75 degree minus 15 degree end cell row blank equals cell 60 degree end cell end table 

table attributes columnalign right center left columnspacing 0px end attributes row cell angle A plus angle B plus angle C end cell equals cell 180 degree end cell row cell angle A plus 50 degree plus 60 degree end cell equals cell 180 degree end cell row cell angle A plus 110 degree end cell equals cell 180 degree end cell row cell angle A end cell equals cell 180 degree minus 110 degree end cell row cell angle A end cell equals cell 70 degree end cell end table 

Oleh karena itu, jawaban yang benar adalah B.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 05 Mei 2021

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