Roboguru

Diketahui kubus yang mempunyai panjang rusuk 1 cm....

Diketahui kubus yang mempunyai panjang rusuk 1 cm. jarak bidang ke bidang = .......

  1. 1 half square root of 3 space end root c m

  2. 2 over 3 square root of 3 space end root c m

  3. 3 over 4 square root of 3 space end root c m

  4. 5 over 6 square root of 3 space end root c m

  5. 6 over 7 square root of 3 space end root c m

Jawaban:

Perhatikantriangle E B G factorial

E B equals B G equals E G equals D B  square root of 1 plus 1 end root equals square root of 2

Maka :

E x equals x G equals 1 half E B equals 1 half square root of 2  B x equals square root of left parenthesis square root of 2 right parenthesis squared minus open parentheses 1 half square root of 2 close parentheses squared end root  equals square root of 2 minus 1 half end root equals square root of 3 over 2 end root equals square root of 6 over 4 end root equals 1 half square root of 6

Perhatikan

x x apostrophe equals 1 space c m  L. triangle D B x equals 1 half D B left parenthesis x x apostrophe right parenthesis equals 1 half B x left parenthesis D Q right parenthesis  open parentheses square root of 2 close parentheses left parenthesis 1 right parenthesis equals 1 half square root of 6 left parenthesis D Q right parenthesis  square root of 2 equals 1 half square root of 6 left parenthesis D Q right parenthesis

Jarak D ke bidang space E B G equals D Q 2 over 3 square root of 3 space c m

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