Let’s solve each problem one by one. We’ll find the area of each polygon using the correct formula for its shape. Remember to include units (like cm² or m²) in your final answer!
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1. Rectangle
Length = 14 ft, Width = 5 ft
Area = length × width = 14 × 5 =
70 ft²
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2. Triangle
Base = 8 in, Height = 3 in
Area = ½ × base × height = ½ × 8 × 3 = 4 × 3 =
12 in²
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3. Square
Side = 9 mm
Area = side × side = 9 × 9 =
81 mm²
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4. Parallelogram
Base = 20 mm, Height = 10 mm
Area = base × height = 20 × 10 =
200 mm²
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5. Triangle
Base = 16 yd, Height = 12 yd
Area = ½ × 16 × 12 = 8 × 12 =
96 yd²
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6. Trapezoid
Top base = 3 m, Bottom base = 6 m, Height = 4 m
Area = ½ × (top + bottom) × height = ½ × (3 + 6) × 4 = ½ × 9 × 4 = 4.5 × 4 =
18 m²
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7. Triangle
Base = 6 in, Height = 4 in
Area = ½ × 6 × 4 = 3 × 4 =
12 in²
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8. Rectangle
Length = 12 cm, Width = 3 cm
Area = 12 × 3 =
36 cm²
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9. Square
Side = 12 m
Area = 12 × 12 =
144 m²
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10. Right Triangle
Legs are 12 ft and 14 ft — these are the base and height
Area = ½ × 12 × 14 = 6 × 14 =
84 ft²
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11. Parallelogram
Base = 8 in, Height = 3 in
Area = 8 × 3 =
24 in²
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Final Answer:
1. 70 ft²
2. 12 in²
3. 81 mm²
4. 200 mm²
5. 96 yd²
6. 18 m²
7. 12 in²
8. 36 cm²
9. 144 m²
10. 84 ft²
11. 24 in²
Parent Tip: Review the logic above to help your child master the concept of area of polygons worksheet.
