Lesson Example Discussion Quiz: Class Homework |
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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