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Jika belahketupat ABCD dengan panjang diagonal AC=60 cm dan luasnya=960 cm2, keliling belahketupat ABCD adalah ....

Pertanyaan

Jika space belahketupat space ABCD space dengan space panjang space diagonal space AC equals 60 space cm space dan space luasnya equals 960 space cm squared comma space  keliling space belahketupat space ABCD space adalah space....

  1. 184 cm

  2. 136 cm

  3. 92 cm

  4. 68 cm

A. Rizky

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

960 space equals space 1 half left parenthesis 60 right parenthesis D subscript 2  D subscript 2 space equals space 960 over 30 space equals space 32  P a n j a n g space s i s i space equals space square root of open parentheses 1 half D subscript 1 close parentheses squared space plus space open parentheses 1 half D subscript 2 close parentheses squared end root  space space space space space space space space space space space space space space space space space space space space space space space space space equals space square root of open parentheses 1 half left parenthesis 60 right parenthesis close parentheses squared space plus space open parentheses 1 half left parenthesis 32 right parenthesis close parentheses squared end root  space space space space space space space space space space space space space space space space space space space space space space space space space equals space square root of open parentheses 30 close parentheses squared space plus space left parenthesis 16 right parenthesis squared end root  space space space space space space space space space space space space space space space space space space space space space space space space space equals space square root of 900 space plus space 256 end root  space space space space space space space space space space space space space space space space space space space space space space space space space equals space square root of 1156  space space space space space space space space space space space space space space space space space space space space space space space space space equals space 34  M a k a comma space K e l i l i n g space equals space 4 space cross times space P a n j a n g space s i s i space equals space 4 space cross times space 34 space equals space 136

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Diketahui luas belahketupat ABCD=480 cm2 . Jika panjang diagonal AC=2O cm, keliling belahketupat ABCD adalah ...

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