- Finding the perimeter or area of a rectangle in the coordinate plane
- Area of a trapezoid
- Area of a parallelogram
- Area involving rectangles and triangles
- Finding the area of a trapezoid on a grid by using triangles and rectangles
- Area of a triangle
- Finding the area of a right triangle or its corresponding rectangle
- Finding the area of a right triangle on a grid
- Area between two rectangles
- Area of a piecewise rectangular figure
- Finding the side length of a rectangle given its perimeter or area
- Word problem involving the area of a square or a rectangle
- Areas of rectangles with the same perimeter
- Distinguishing between the area and perimeter of a rectangle
- Area of a rectangle involving fractions
- Perimeter of a piecewise rectangular figure
- Finding the missing length in a figure
- Sides of polygons having the same perimeter
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Distinguishing between the area and perimeter of a rectangle
In this lesson we solve real world problems involving the perimeter and area of rectangles. This makes it easy to distinguish between the practical apppcation of perimeter and area calculation of rectangles in real pfe.
Formula for finding Perimeter of a rectangle
The perimeter of a rectangle of length l and width w is given by
Perimeter P = 2(l + w) units
Formula for finding Area of a rectangle
If a rectangle has a length ‘l’ and a width ‘w’, then the area of the rectangle is given by
Area A = l × w square units
Find the perimeter of the following rectangle.
Solution
Step 1:
Perimeter of a rectangle = 2(l + w); l = length = 6; w = width = 5
Step 2:
Perimeter of given rectangle = 2(6 + 5) = 22 units
Find the area of the following rectangle.
Solution
Step 1:
Area of a rectangle = l × w; l = length = 9; w = width = 2
Step 2:
Area of given rectangle = 9 × 2 = 18 square units