Finding Missing Sides Worksheet
Grade 6 math worksheet to practice finding missing sides of various geometric shapes given perimeter or area.
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Finding Missing Sides
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Read each question carefully and find the missing side length for each shape. Show your work.
1. A rectangle has a perimeter of 36 cm. If its length is 10 cm, what is its width?
2. The area of a rectangle is 48 square meters. If the width is 6 meters, what is the length?
3. A square has a perimeter of 44 inches. What is the length of one side?
4. The area of a square is 81 square feet. What is the length of one side?
5. A triangle has a perimeter of 25 cm. If two of its sides measure 8 cm and 9 cm, the third side measures cm.
6. An equilateral triangle has a perimeter of 27 inches. Each side measures inches.
7. A rectangular garden has an area of 72 square feet. If the length is 9 feet, what is the width?
6 feet
7 feet
8 feet
9 feet
8. The perimeter of a regular pentagon is 40 cm. What is the length of one side?
5 cm
8 cm
10 cm
40 cm
9. A rectangular swimming pool has a perimeter of 50 meters. If the length is 15 meters, what is the width? Draw a diagram of the pool and label all sides.
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