Area of a rectangle
What is the area of a rectangle if the length is 9 cm and the width is 6 cm?
54 cm²
A rectangle is 8 cm long and 5 cm wide. What is the perimeter of the rectangle?
26 cm
If you walk all the way around a garden, you are finding its...
A. Area
B. Perimeter
C. Length
D. Width
B. Perimeter
Emma is making a flower garden. The garden measures 4 feet long and 5 feet wide. What is the area of the garden?
Area = length × width
Area = 4 × 5 = 20 square feet
What is the formula we use to find area?
l x w
A rectangle is 12 meters long and 8 meters wide. What is its area?
96 m²
A playground is 15 meters long and 9 meters wide. What is the perimeter of the playground?
48 meters
A rectangle is 7 cm long and 5 cm wide. What is its area?
A. 12 cm²
B. 24 cm²
C. 35 cm²
D. 70 cm²
C. 35 cm²
Michael is building a fence around his vegetable garden. The garden is 9 feet long and 6 feet wide. How many feet of fencing does he need to go all the way around the garden?
Perimeter = 2 × (length + width)
= 2 × (9 + 6)
= 2 × 15
= 30 feet
How do we find perimeter?
Add all sides together
or
2x(L+W)
The area of a rectangle is 56 square feet. The width is 7 feet. What is the length?
8 ft
A rectangle has a perimeter of 30 cm. The length is 9 cm. What is the width?
Answer:
30 ÷ 2 = 15
15 − 9 = 6 cm
A rectangular garden has a perimeter of 30 meters. The length is 9 meters. What is the width?
A. 4 m
B. 5 m
C. 6 m
D. 7 m
30 ÷ 2 = 15
15 − 9 = 6
C. 6 m
Each table is 4 feet long and 3 feet wide. What is the total area of 5 tables put together?
Area of one table:
4 × 3 = 12 square feet
Area of five tables:
12 × 5 = 60 square feet
What is perimeter?
The distance that is around the outside edge of a shape
Which rectangle has the greatest area?
A. Length = 5 cm, Width = 8 cm
B. Length = 6 cm, Width = 7 cm
C. Length = 9 cm, Width = 4 cm
D. Length = 10 cm, Width = 3 cm
A. 40 cm²
B. 42 cm²
C. 36 cm²
D. 30 cm²
Answer: B. Length = 6 cm, Width = 7 cm (42 cm²)
Each side of a rectangular garden needs a fence. The garden is 12 feet long and 8 feet wide. Fence costs $5 per foot. How much will it cost to fence the entire garden?
Answer:
Perimeter = 2 × (12 + 8) = 40 ft
Cost = 40 × $5 = $200
A classroom rug is 8 feet long and 6 feet wide. Another rug has the same perimeter but a different area. Which statement is true?
A. Two rectangles with the same perimeter always have the same area.
B. Two rectangles with the same perimeter can have different areas.
C. Two rectangles with the same area always have the same perimeter.
D. Perimeter and area are always equal.
B. Two rectangles with the same perimeter can have different areas.
A rectangle has a perimeter of 40 cm. The length of the rectangle is 14 cm. What is the width of the rectangle?
Perimeter = 2 × (length + width)
40 ÷ 2 = 20
Length + Width = 20
14 + Width = 20
Width = 20 − 14 = 6 cm
What is area?
The amount space inside of a shape
A rectangular classroom rug is 8 feet long and 5 feet wide. Four identical rugs are placed on the floor without overlapping. What is the total area covered by the four rugs?
Area of one rug = 8 × 5 = 40 ft²
Four rugs = 40 × 4 = 160 ft²
160 ft²
Two rectangles have the same perimeter of 24 cm.
Rectangle A is 8 cm longR；ectangle B is 5 cm long.
What is the width of each rectangle? Which rectangle has the greater area? Show your work.
Answer:
Rectangle A:
24 ÷ 2 = 12
12 − 8 = 4 cm
Area = 8 × 4 = 32 cm²
Rectangle B:
24 ÷ 2 = 12
12 − 5 = 7 cm
Area = 5 × 7 = 35 cm²
Rectangle B has the greater area.
A rectangle has a perimeter of 36 cm and an area of 80 cm². What are the length and the width of the rectangle?
A. 12 cm and 6 cm
B. 10 cm and 8 cm
C. 14 cm and 4 cm
D. 16 cm and 2 cm
B. 10 cm and 8 cm
Perimeter = 2 × (10 + 8) = 36 cm ✔️
Area = 10 × 8 = 80 cm² ✔️
The area of a classroom is 72 square meters. The reading corner is one-sixth the size of the classroom. What is the area of the reading corner?
Area of the reading corner:
72 ÷ 6 = 12 square meters
If the area is 40 square units, and it needs to be covered by the tile. The tile's length is 2 units, and the width is 1 unit. How many tiles it needs in total?
20