Area of composite shapes
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. What is the area of this shape, in square metres? All the corners are right angles.
2. What is the area of this shape, in square metres? All the corners are right angles.
3. What is the area of this shape, in square metres? All the corners are right angles.
4. What is the area of this shape, in square metres? All the corners are right angles.
5. What is the area of this shape, in square metres? All the corners are right angles.
Answer key · Area of composite shapes
1. 72
The dashed line splits the shape into two rectangles.
6 × 4 = 24 and 12 × 4 = 48.
24 + 48 = 72 m².
2. 75
The dashed line splits the shape into two rectangles.
7 × 7 = 49 and 13 × 2 = 26.
49 + 26 = 75 m².
3. 92
The dashed line splits the shape into two rectangles.
4 × 2 = 8 and 14 × 6 = 84.
8 + 84 = 92 m².
4. 45
The dashed line splits the shape into two rectangles.
3 × 9 = 27 and 9 × 2 = 18.
27 + 18 = 45 m².
5. 22
The dashed line splits the shape into two rectangles.
2 × 5 = 10 and 6 × 2 = 12.
10 + 12 = 22 m².
Try it together
Choose three objects at home. Estimate their measurements, then check together and explain the differences.