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Perhatikan gambar segitiga siku-siku ABC di bawah....

Perhatikan gambar segitiga siku-siku ABC di bawah. Tentukan:

b. luas segitiga ABC.

Jawaban:

Sisi-sisi segitiga dapat dicari menggunakan perbandingan sisi dengan sudut khusus begin mathsize 14px style 60 degree space dan space 30 degree end style.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell AD space colon space DC space colon space AC end cell equals cell 1 space colon space square root of 3 space colon space 2 end cell row blank blank blank row cell AC over AD end cell equals cell 2 over 1 end cell row cell AC over 8 end cell equals 2 row AC equals 16 row blank blank blank row cell DC over AD end cell equals cell fraction numerator square root of 3 over denominator 1 end fraction end cell row cell DC over 8 end cell equals cell square root of 3 end cell row DC equals cell 8 square root of 3 end cell row blank blank blank row cell DC space colon space DB space colon space BC end cell equals cell 1 space colon space square root of 3 space colon space 2 end cell row cell BC over DC end cell equals cell 2 over 1 end cell row cell fraction numerator BC over denominator 8 square root of 3 end fraction end cell equals 2 row BC equals cell 16 square root of 3 end cell row blank blank blank row cell DB over DC end cell equals cell fraction numerator square root of 3 over denominator 1 end fraction end cell row cell fraction numerator DB over denominator 8 square root of 3 end fraction end cell equals cell square root of 3 end cell row DB equals 24 row blank blank blank row Luas equals cell 1 half cross times AB cross times DC end cell row blank equals cell 1 half cross times 32 cross times 8 square root of 3 end cell row blank equals cell 128 square root of 3 space cm squared end cell end table end style

Jadi, luas segitiga ABC adalah Error converting from MathML to accessible text..

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