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Maths · Grade 3 · Set B
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B
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Remember: Perimeter is the way round. Add every side. It is not the number of squares inside.

Add every side

1
A rug is 6 feet by 4 feet. How many feet all the way round it?
2
Two sides of the path are labeled, in meters. How many meters all the way round?
3
How many inches is it all the way round the flag?
4
A square mat has sides of 7 feet. How many feet all the way round?
5
All the way round is 26 cm. How long is the missing side?
6
Each square is 1 foot. How many feet all the way round the rectangle?
7
Each square is 1 meter. How many meters all the way round the L shaped garden?

Perimeter is not area

8
Each one holds 8 squares. Which has the longer way round?
the one on the leftthe one on the right
9
A square with sides of 6 cm has a perimeter of 24 cm.
TrueFalse
10
Both rectangles hold 12 squares, so both have the same way round.
TrueFalse
11
A picture frame is 12 inches long and 9 inches wide. How many inches of ribbon go all the way round the frame?
12
Which one adds every side of the triangle?
6 × 96 + 96 + 9 + 7
13
Draw a rectangle with a perimeter of 14 units on the grid.
14
Write how you know the perimeter is not the number of squares inside the shape.
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Answer key · Set B
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120 6 + 4 + 6 + 4 = 20 feet.
220 A rectangle has two sides of 7 and two sides of 3. 7 + 3 + 7 + 3 = 20.
317 Add the three sides: 4 + 7 + 6 = 17.
428 A square has 4 equal sides. 7 + 7 + 7 + 7 = 28.
54 9 + 4 + 9 = 22 so far. 26 - 22 = 4 cm.
618 The rectangle is 3 feet by 6 feet. 3 + 6 + 3 + 6 = 18.
718 Go round once: 2 + 2 + 3 + 2 + 5 + 4 = 18 meters.
8the one on the left The left one is 8 + 1 + 8 + 1 = 18 units round. The right one is 4 + 2 + 4 + 2 = 12.
9True 6 + 6 + 6 + 6 = 24 cm.
10False The left one is 3 + 4 + 3 + 4 = 14 round. The right one is 2 + 6 + 2 + 6 = 16.
1142 12 + 9 + 12 + 9 = 42 inches.
126 + 9 + 7 Perimeter is all the way round, so add all three sides.
14Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.