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1) Óãîë EFN – ïðÿìîé (ðèñ. 7.39à), special-edu.kz.
KFN 55 .
2) Ãðàäóñíàÿ ìåðà óãëà ÐFK ðàâíà
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115 . Óãîë ÐFÅ – ïðÿìîé (ðèñ. 7.39b).
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Ðèñ. 7.39
28
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