1. Area of Parallelogram
Lesson 16.3

2. Area
Area is the amount of space inside a figure. We use square units to describe area.
For rectangles, the area formula is A=lw (area equals length times width).
For squares, the formula is still A=lw. However, since every side of a square is the same, then it can also be expressed as A=s2 where s equals the length of one side.

3. Example A=lw A=12(8) A=96 sq. m 12 m 8 m
Area is expressed in square units. It can be written (in this case) as 96 sq. m or 96 m2.

4. Area of Irregular Shapes
Count how many squares are completely covered by the shape. Put partial squares together to make wholes.
13 squares are full.
2 squares are almost full, and they can be matched up with 2 squares that are almost empty.
3 squares are about half full – when two are put together that makes a full square. The half square is left over.
Altogether, there are 16 and a half squares full.

5. Area of Parallelogram
A = bh
1.5 × 2 =
1.5 in.
2 in.
2 in.

6. Practice Time