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Subject
Topic
Level
Middle School
Grade
4

Finding perimeter and area of a rectangle.

Math example.

Answer

The perimeter of a rectangle is given by the formula, P = 2 l + 2 w , where is the length and is the width of the rectangle.

The area of a rectangle is given by the formula, A = l w , where is the length and is the width.

 

1.a. P= 2L + 2w = 2x8 + 2x5 = 16 + 10 = 26      A= L x w = 8 x 5 = 40

1.b. P= 2L + 2w = 2x5 + 2x7 = 10 + 14 = 24      A= L x w = 5 x 7 = 35

 

2.a. P= 2L + 2w = 2x7 + 2x3 = 14 + 6 = 20cm      A= L x w = 7 x 3 = 21cm2

2.b. P= 2L + 2w = 2x4 + 2x9 = 8 + 18 = 26cm      A= L x w = 4 x 9 = 36cm2

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