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11 1 Areas Of Rectangles

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11 1 Areas Of Rectangles

  1. 1. 11-1 Areas of Rectangles
  2. 2. Area <ul><li>Length – Distance </li></ul><ul><li>Area – Surface </li></ul><ul><li>WHY should we care about area??? </li></ul><ul><ul><li>Painting, construction, architecture… </li></ul></ul>
  3. 3. Area of a square <ul><li>The square of the length of a side </li></ul><ul><li>A = s 2 </li></ul>s
  4. 4. Area congruence <ul><li>If two figures are congruent their areas are the same </li></ul>
  5. 5. Area of a rectangle <ul><li>Base times height </li></ul><ul><li>A =bh </li></ul>12 3
  6. 6. Area addition postulate <ul><li>The area of a region is the sum of the areas of its non-overlapping parts </li></ul>4 5 5 2 Area = ?
  7. 7. Proof for area of a rectangle b 2 b b b h h h h h 2 b A A
  8. 8. SPICSA <ul><li>Page 426 1-16 all </li></ul><ul><li>Page 426 18-22 even </li></ul>

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