To find the perimeter of a rectangle, you add up the lengths of all four sides. Since opposite sides of a rectangle are equal, you can use this formula:
Perimeter = 2 × (length + width)
or
Perimeter = length + length + width + width
Let’s solve each problem one by one.
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1) Rectangle with sides 30 m and 45 m
Perimeter = 2 × (30 + 45) = 2 × 75 =
150 m
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2) Rectangle with sides 16 yd and 9 yd
Perimeter = 2 × (16 + 9) = 2 × 25 =
50 yd
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3) Rectangle with sides 11 ft and 8 ft
Perimeter = 2 × (11 + 8) = 2 × 19 =
38 ft
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4) Rectangle with sides 19 yd and 36 yd
Perimeter = 2 × (19 + 36) = 2 × 55 =
110 yd
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5) Rectangle with sides 11 ft and 8 ft → Same as #3
Perimeter = 2 × (11 + 8) = 2 × 19 =
38 ft
*(Note: Even though it looks taller, the side labels show 11 ft on top/bottom and 8 ft on left/right — same as #3.)*
Wait — let me double-check the image description from your upload. In problem 5, if the vertical side is labeled 11 ft and horizontal is 8 ft, then:
Actually, looking again — in problem 5, the rectangle has:
- Top/Bottom: 8 ft
- Left/Right: 11 ft
So yes, same as #3: 8 + 8 + 11 + 11 = 38 ft →
38 ft
But wait — in problem 3, it was 11 ft (top) and 8 ft (side). So same numbers, just rotated. Perimeter doesn’t change.
✔ Confirmed:
38 ft
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6) Rectangle with sides 36 in and 16 in
Perimeter = 2 × (36 + 16) = 2 × 52 =
104 in
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7) Rectangle with sides 12 ft and 40 ft
Perimeter = 2 × (12 + 40) = 2 × 52 =
104 ft
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8) Rectangle with sides 15 in and 40 in
Perimeter = 2 × (15 + 40) = 2 × 55 =
110 in
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9) Rectangle with sides 40 yd and 23 yd
Perimeter = 2 × (40 + 23) = 2 × 63 =
126 yd
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Now, let’s list all answers clearly:
1) 150 m
2) 50 yd
3) 38 ft
4) 110 yd
5) 38 ft
6) 104 in
7) 104 ft
8) 110 in
9) 126 yd
I’ve checked each calculation twice to make sure there are no mistakes.
Final Answer:
1) 150 m
2) 50 yd
3) 38 ft
4) 110 yd
5) 38 ft
6) 104 in
7) 104 ft
8) 110 in
9) 126 yd
Parent Tip: Review the logic above to help your child master the concept of perimeter and area of a rectangle worksheet.
