A focused Grade 4 learning session for Area and Perimeter of Rectangles using visual models, worked examples, strategy guidance, and a short mastery check.
Student goal: I can use formulas to find the area or perimeter of a rectangle.
Area and Perimeter of Rectangles means measuring how much flat space a figure covers by using equal-sized square units.
Question: What is the area of the rectangle shown above?
Why it works: From the diagram, length is \(7\) cm and width is \(3\) cm. Area \(= 7 \times 3 = 21\) sq cm.
Answer: \(21\) sq cm
Question: Each square in the grid above is \(1\) square unit. How many square units cover the rectangle?
Answer: \(12\) sq units
Question: What is the area of the shaded rectangle above?
Answer: \(20\) sq m
Question: A garden is shaped like a rectangle. It is \(9\) feet long and \(5\) feet wide. How many feet of fencing are needed to go around the garden?
Why it works: To find how much fencing goes around the garden, we calculate perimeter: \(P = 2(9) + 2(5) = 18 + 10 = 28\) ft.
Answer: \(28\) ft
Area and Perimeter of Rectangles becomes easier when students connect the question to a model, use clear steps, and explain why the answer fits.
Area means every square unit inside the figure.
Use scratch paper. The explanation matters more than simply seeing whether the choice is correct.
A rectangle has a length of \(8\) ft and a width of \(5\) ft. What is its area?
Answer C: \(40\) sq ft
To find area, we multiply length times width: \(8 \times 5 = 40\) sq ft.
A rectangle has a length of \(12\) m and a width of \(7\) m. What is its perimeter?
Answer B: \(38\) m
Perimeter is the distance around the rectangle. Use the formula \(P = 2\ell + 2w = 2(12) + 2(7) = 24 + 14 = 38\) m.
Diego draws a rectangle with a length of \(6\) cm and a width of \(4\) cm. What is the area of his rectangle?
Answer C: \(24\) sq cm
Multiply length by width: \(6 \times 4 = 24\) sq cm.
A garden is shaped like a rectangle. It is \(9\) feet long and \(5\) feet wide. How many feet of fencing are needed to go around the garden?
Answer B: \(28\) ft
To find how much fencing goes around the garden, we calculate perimeter: \(P = 2(9) + 2(5) = 18 + 10 = 28\) ft.
What is the area of a rectangle that is \(10\) inches long and \(3\) inches wide?
Answer C: \(30\) sq in
Area \(= \text{length} \times \text{width} = 10 \times 3 = 30\) sq in.
A poster is a rectangle with a length of \(11\) inches and a width of \(8\) inches. What is its perimeter?
Answer B: \(38\) in
The perimeter of the poster is \(P = 2(11) + 2(8) = 22 + 16 = 38\) in.
What is the area of the rectangle shown above?
Answer C: \(21\) sq cm
From the diagram, length is \(7\) cm and width is \(3\) cm. Area \(= 7 \times 3 = 21\) sq cm.
What is the perimeter of the rectangle shown above?
Answer B: \(32\) in
The rectangle is \(10\) in long and \(6\) in wide. Perimeter \(= 2(10) + 2(6) = 20 + 12 = 32\) in.
A room is \(15\) feet long and \(12\) feet wide. What is the area of the floor?
Answer C: \(180\) sq ft
The floor area is \(15 \times 12 = 180\) sq ft.
Mia's bedroom window is a rectangle. The length is \(4\) feet and the width is \(3\) feet. What is the area of the window?
Answer B: \(12\) sq ft
Window area \(= 4 \times 3 = 12\) sq ft.
A swimming pool cover is rectangular and measures \(20\) meters long and \(8\) meters wide. How much space does the cover take up?
Answer C: \(160\) sq m
Space covered \(= 20 \times 8 = 160\) sq m.
