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Tentukan: b. Luas

Tentukan:

b. Luas begin mathsize 14px style triangle A B C end style 

Jawaban:

Diketahui:

AB = 26 cm

AC = 40 cm

AD = 24 cm

BD = 10 cm

DC = 32 cm

Ditanya: Luas begin mathsize 14px style triangle A B C end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell L u a s space triangle space A B D end cell equals cell 1 half cross times B D cross times A D end cell row blank equals cell 1 half cross times 10 cross times 24 end cell row blank equals cell 120 space c m squared end cell row cell L u a s space triangle space A D C end cell equals cell 1 half cross times D C cross times A D end cell row blank equals cell 1 half cross times 32 cross times 24 end cell row blank equals cell 384 space c m squared end cell row cell L u a s space triangle space A B C end cell equals cell L u a s space triangle space A B D plus L u a s space triangle space A D C end cell row blank equals cell 120 plus 384 end cell row blank equals cell 504 space c m squared end cell row blank blank blank row blank blank blank end table end style

Jadi, Luas begin mathsize 14px style triangle A B C end style adalah begin mathsize 14px style 504 c m squared end style

 

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