Perimeter and Area Quiz

Grade 4 · Math · Quiz

Practice calculating perimeter and area of rectangles and squares.

Questions

What is the area of a rectangle with length 8 m and width 3 m?
1. 11 m²
2. 22 m²
3. 24 m²
4. 48 m²
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Answer: 24 m²
A = 8 × 3 = 24 m².
Perimeter is measured in square units.
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Answer: False
Perimeter is measured in linear units (cm, m, ft). Square units are for area.
A square with sides of 5 cm has a perimeter of ___ cm.
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Answer: 20
A square has 4 equal sides. P = 4 × 5 = 20 cm.
A garden is 12 feet long and 7 feet wide. What is the perimeter?
1. 19 ft
2. 38 ft
3. 84 ft
4. 84 ft²
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Answer: 38 ft
P = 2 × (12 + 7) = 2 × 19 = 38 ft. Not square units — perimeter is a length.
Which rectangle has the largest area?
1. 3×10
2. 5×6
3. 4×8
4. 2×14
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Answer: 4×8
3×10=30, 5×6=30, 4×8=32, 2×14=28. The largest area is 32 (4×8).
A rectangle with length 10 and width 2 has the same area as a rectangle with length 5 and width 4.
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Answer: True
10×2=20 and 5×4=20. Same area even though different shapes.
The area of a square with side length 9 inches is ___ in².
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Answer: 81
A = 9 × 9 = 81 in².
A classroom floor is 11 m long and 8 m wide. How much tile is needed to cover it?
1. 19 m
2. 38 m
3. 88 m
4. 88 m²
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Answer: 88 m²
A = 11 × 8 = 88 m². Tile covers area, so the answer is in square meters.
Two rectangles with the same area always have the same perimeter.
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Answer: False
A 1×12 rectangle has area 12 and perimeter 26. A 3×4 rectangle also has area 12 but perimeter 14. Same area, different perimeters.
A rectangle has perimeter 30 cm and width 5 cm. Its length is ___ cm.
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Answer: 10
P = 2×(l+w) → 30 = 2×(l+5) → 15 = l+5 → l = 10 cm.

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