Ud 2 proporcionalidad y semejanza

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Ud 2 proporcionalidad y semejanza

  1. 1. Unidad Didáctica 2 Proporcionalidad y semejanza.
  2. 2. 2
  3. 3. 3 a b =c a b c 1 (Fig. 1) a 1 = c b a 1 = b a a
  4. 4. 4 www.dibujotecnico.com A B c D = =K c = =K A 1 /B 1 /D a b c d = a b b c = (Fig. 2) b a b c
  5. 5. 5 www.dibujotecnico.com A B C     H a + b (Fig. 1) A B C     H a - b (Fig. 2) a c c b = a
  6. 6. 6 a =b a.1=b.b a b b 1 = b a a 1 =b= a2 b.1=a.a a
  7. 7. 7 L R .R L = B C D E G F + RR L b.h 2 h 2 L b h/2 L = A C h h/2 bh/2 B L s
  8. 8. 8 3 cm 300 km E= = = 3 cm 30000000 cm 1 10000000
  9. 9. 9 AB A´B´ BC B´C´ CD C´D´ DA D´A´ = = =
  10. 10. 10 O O=A=(Fig.2) (Fig.3)

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