Solutions — Exercises II / 2.1
  1. a.  1 ft²  =  144 in²
    b.  1 in²  =  6.4516 cm²

  2. a.  1 in²  =  645.16 mm²
    b.  1 m²  ≈  10.76 ft²

  3. 100 ha  =  1 square kilometer

  4. 456ft

  5. √ 287  + 17 in   ≈   17 in
    2
  6. 578 + 17√ 287  in²   ≈   216.5 in²
    4
  7. a.  20 ft²       b.  increases by a factor of "4" (i.e., the Area quadruples)
                          c.  A2  =    4   × A1

  8. a.  The Perimeter doubles or increases by a factor of 2
    b.  The Area quadruples or increases by a factor of 4

  9. a.  The Circumference doubles or increases by a factor of 2
    b.  The Area quadruples or increases by a factor of 4

  10. a.  The Circumference triples or increases by a factor of 3
    b.  The Area increases by a factor of 9