Grade 4 - Progress in Mathematics

Complex Figures

Use grid paper to help to answer each question.

7. Draw two rectangles that
   have the same area, but
   different perimeters.
   8. Draw two rectangles that
   have the same perimeter,
   but different areas.

To find the area of a complex figure:

• Separate the figure into known figures.


• Find the area of each figure.


• Add the areas.

To find the perimeter of a complex figure:

• Add the lengths of its sides.
  5 ft
  6 ft
  2 ft
  3 ft
  3 ft
  3 ft 22 ft
  P22 ft

A 3  3

A9 ft^2

A 2  6

A12 ft^2

A9 ft^2 
12 ft^2 21 ft^2

Find the area and perimeter of each complex figure.

6 ft

2 ft

3 ft

3 ft

3 ft

5 ft

3 ft

3 ft

3 cm 3 cm

5 cm

12 cm

6 cm

3 cm

6 ft

2 ft

3 yd

2 yd

2 yd

2 yd

5 yd

4 yd

14 m

4 m

2 m 10 m

4 m

6 m

12 ft

7 ft

2 ft

2 ft

3 ft

3 ft

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