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Perhatikan gambar! Jika luas juring , luas juring  adalah ...

Pertanyaan

Perhatikan gambar!

Jika luas juring begin mathsize 14px style text OBC end text equals text 60 cm end text squared end style, luas juring begin mathsize 14px style text OAC end text end style adalah ...

  1. begin mathsize 14px style text 44 cm end text squared end style

  2. begin mathsize 14px style text 76 cm end text squared end style

  3. begin mathsize 14px style text 104 cm end text squared end style

  4. begin mathsize 14px style text 120 cm end text squared end style

Pembahasan Soal:

Perhatikan perhitungan berikut ini.

Ingat, mencari luas juring dengan perbandingan:

begin mathsize 14px style fraction numerator straight alpha subscript 1 over denominator Luas space juring space 1 end fraction equals fraction numerator straight alpha subscript 2 over denominator Luas space juring space 2 end fraction end style

Diketahui luas juring begin mathsize 14px style text OBC end text equals text 60 cm end text squared end style, maka luas juring begin mathsize 14px style text OAC end text end style yaitu:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator straight alpha subscript 1 over denominator Luas space juring space 1 end fraction end cell equals cell fraction numerator straight alpha subscript 2 over denominator Luas space juring space 2 end fraction end cell row cell fraction numerator 120 degree over denominator 60 space cm squared end fraction end cell equals cell fraction numerator 152 degree over denominator Luas space juring space OAC end fraction end cell row cell Luas space juring space OAC end cell equals cell fraction numerator 152 degree times 60 space cm squared over denominator 120 degree end fraction end cell row cell Luas space juring space OAC end cell equals cell fraction numerator 152 degree times 60 space cm squared over denominator 120 degree end fraction end cell row cell Luas space juring space OAC end cell equals cell fraction numerator 152 space cm squared over denominator 2 end fraction end cell row cell Luas space juring space OAC end cell equals cell 76 space cm squared end cell end table end style

Jadi, luas juring begin mathsize 14px style text OAC end text end style adalah begin mathsize 14px style text 76 cm end text squared end style.

Dengan demikian, jawaban yang tepat adalah B.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 12 Maret 2021

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