Step-4

Title: Circle

Grade: 4-a Lesson: S2-L3

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

Lesson Steps

Step Type Explanation Answer

1

Problem

To find the radius of a circle when the area is 452 square meters.

2

Step

The area of a circle is given

452 sq.mtrs

3

Formula

Area of a circle

A = \$ π(r)^2\$

4

Hint

π value is 3.14

5

Step

Let’s determine the radius of a circle.

\$r^2 = A/π\$

6

Step

Substitute the values

\$r^2 = 452/3.14\$

7

Step

Apply square root on both sides.

\$\sqrt(r^2) = \sqrt(452/3.14)\$

8

Step

After cancellation

\$\sqrt(r^2) = \sqrt(144.06)\$

9

Step

Approximately

r = 12

10

Step

So,the radius of a circle is 12mtrs.

11

SumUp

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

12

Choice.A

The obtained solution for the problem matches the value of 12 meters provided, confirming the correct radius of the circle

12 mtrs

13

Choice.B

The answer obtained for this problem differs from option 13, indicating an incorrect radius value of 13 meters

13 mtrs

14

Choice.C

The answer obtained for this problem differs from option 15, indicating an incorrect radius value of 15 meters

15 mtrs

15

Choice.D

The answer obtained for this problem differs from option 14, indicating an incorrect radius value of 14 meters

14 mtrs

16

Answer

Option

A

17

SumUp

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


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