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Pertanyaan

Layang-layang ABCD diagonal-diagonalnya berpotongan di titik O. Panjang A O equals 9 space cm, B O equals 12 space cm, O D equals 40 space cm. Hitunglah keliling layang-layang!

Y. Herlanda

Master Teacher

Mahasiswa/Alumni STKIP PGRI Jombang

Jawaban terverifikasi

Pembahasan

Menghitung panjang AB

table attributes columnalign right center left columnspacing 0px end attributes row cell A B end cell equals cell square root of B O squared plus A O squared end root end cell row blank equals cell square root of 12 squared plus 9 squared end root end cell row blank equals cell square root of 144 plus 81 end root end cell row blank equals cell square root of 225 end cell row blank equals cell 15 space cm end cell end table

Menghitung panjang AD

table attributes columnalign right center left columnspacing 0px end attributes row cell A D end cell equals cell square root of O D squared plus A O squared end root end cell row blank equals cell square root of 40 squared plus 9 squared end root end cell row blank equals cell square root of 1.600 plus 81 end root end cell row blank equals cell square root of 1.681 end root end cell row blank equals cell 41 space cm end cell end table  

Menghitung keliling layang-layang

table attributes columnalign right center left columnspacing 0px end attributes row K equals cell 2 cross times open parentheses s subscript 1 plus s subscript 2 close parentheses end cell row blank equals cell 2 cross times open parentheses 15 plus 41 close parentheses end cell row blank equals cell 2 cross times 56 end cell row blank equals cell 112 space cm end cell end table

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Pada layang-layang ABCD di samping, panjang AD=20cm,OD=16cm, dan AC=42cm. a. Hitunglah panjang OA, OC, dan BC! b. Hitunglah keliling layang-layang ABCD tersebut!

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Jawaban terverifikasi

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