11-1 Areas of Rectangles

Area

• Length – Distance

• Area – Surface

• WHY should we care about area???– Painting, construction, architecture…

Area of a square

• The square of the length of a side

A = s2

s

Area congruence

• If two figures are congruent their areas are the same

Area of a rectangle

• Base times height

A =bh

12

3

Area addition postulate

• The area of a region is the sum of the areas of its non-overlapping parts

4

5

5

2 Area = ?

Proof for area of a rectangle

b2b

b

b

h

h

h

h

h2

b

A

A

SPICSA

• Page 426 1-16 all

• Page 426 18-22 even