The document discusses the concept of area and provides formulas for calculating the area of different shapes. It defines area as the surface enclosed by a shape and explains that the area of a square is the length of one side squared. It also states that if two figures are congruent, their areas are the same, and that the area of a rectangle is calculated by multiplying its base by its height. Finally, it provides a proof that the formula for the area of a rectangle is base times height.

1. 11-1 Areas of Rectangles

2. Area Length – Distance Area – Surface WHY should we care about area??? Painting, construction, architecture…

3. Area of a square The square of the length of a side A = s 2 s

4. Area congruence If two figures are congruent their areas are the same

5. Area of a rectangle Base times height A =bh 12 3

6. Area addition postulate The area of a region is the sum of the areas of its non-overlapping parts 4 5 5 2 Area = ?

7. Proof for area of a rectangle b 2 b b b h h h h h 2 b A A

8. SPICSA Page 426 1-16 all Page 426 18-22 even