Lesson Example Discussion Quiz: Class Homework |
Step-3 |
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 |
The diameter of a circle is given as 10cm. Find the area of the circle. |
|
2 |
Step |
The diameter of a circle is given (D) |
10 cm |
3 |
Formula |
The radius of a circle |
R = \$D/2\$ |
4 |
Step |
Substitute the values |
R = \$10/2\$ |
5 |
Step |
The radius of a circle is 5 cm. |
|
6 |
Formula |
Area of a circle |
A = \$ π(r)^2\$ |
7 |
Hint |
π value is 3.14. |
|
8 |
Step |
Substitute the values using Area of a circle formula |
A = \$ 3.14 \times(5)^2\$ A = \$ 3.14 \times 25\$ |
9 |
Step |
After multiplication the value we get, |
A = 78.5 |
10 |
Step |
So, the area of a circle is 78.5sq.cm. |
|
11 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
12 |
Choice.A |
The provided choice is incorrect, resulting in an inaccurate calculation of the circle’s area as 211 sq.cm |
121 sq.cm |
13 |
Choice.B |
The provided choice is incorrect, resulting in an inaccurate calculation of the circle’s area as 67.5 sq.cm |
67.5 sq.cm |
14 |
Choice.C |
The answer correctly corresponds to this option, affirming that the area of the circle is 78.5 square centimeters |
78.5 sq.cm |
15 |
Choice.D |
The provided choice is incorrect, resulting in an inaccurate calculation of the circle’s area as 77.6 sq.cm |
77.6 sq.cm |
16 |
Answer |
Option |
C |
17 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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