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Step-5

Title: Area of a Rectangle

Grade: 4-a Lesson: S1-L6

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Iron Man wanted to make a dog pen with an area of 45 square feet. What could the dimensions of his dog pen be?
2	Step	Area of a rectangle	45 sq.feet
3	Step	Here only the area is given, we want to find the length and breadth.
4	Step	To find the length and breadth of a dog pen.
5	Step	We want to see the pair of numbers that multiply to 45.
6	Step	45 is multiplied by 5 x 9. Here 5 x 9 is equals to 45.
7	Step	So, the two dimensions are 5 ft and 9 ft.
8	SumUp	Can you summarize what you’ve understood in the above steps?
9	Choice.A	This is correct because it results in an area of 45 square feet	5 feet , 9 feet
10	Choice.B	This is not correct because it results in an area of 36 square feet, not the required 45 square feet	4 feet , 9 feet
11	Choice.C	This is not correct because it results in an area of 27 square feet, not the required 45 square feet	9 feet , 3 feet
12	Choice.D	This is not correct because it results in an area of 12 square feet, not the required 45 square feet	6 feet, 2 feet
13	Answer	Option	A
14	SumUp	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Iron Man wanted to make a dog pen with an area of 45 square feet. What could the dimensions of his dog pen be?

Step

Area of a rectangle

45 sq.feet

Step

Here only the area is given, we want to find the length and breadth.

Step

To find the length and breadth of a dog pen.

Step

We want to see the pair of numbers that multiply to 45.

Step

45 is multiplied by 5 x 9. Here 5 x 9 is equals to 45.

Step

So, the two dimensions are 5 ft and 9 ft.

SumUp

Can you summarize what you’ve understood in the above steps?

Choice.A

This is correct because it results in an area of 45 square feet

5 feet , 9 feet

Choice.B

This is not correct because it results in an area of 36 square feet, not the required 45 square feet

4 feet , 9 feet

Choice.C

This is not correct because it results in an area of 27 square feet, not the required 45 square feet

9 feet , 3 feet

Choice.D

This is not correct because it results in an area of 12 square feet, not the required 45 square feet

6 feet, 2 feet

Answer

Option

SumUp

Can you summarize what you’ve understood in the above steps?