area of parallelogram lesson 16.3. area area is the amount of space inside a figure. we use square...

Area of Parallelogram

Lesson 16.3

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.

Example12 m

8 mA=lwA=12(8)A=96 sq. m

Area is expressed in square units. It can be written (in this case) as 96 sq. m or 96 m2.

Area of Irregular ShapesCount 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.

Area of Parallelogram

A = bh

2 in.

2 in.1.5 in.

1.5 × 2 =

Practice Time