Lesson Example Discussion Quiz: Class Homework |
Step-5 |
Title: Find area |
Grade: 6-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 |
Find the area of a circle whose diameter is 15 cm. |
|
2 |
Step |
The given diameter is |
15 cm |
3 |
Formula: |
The area of circle |
\$A = πr^2\$ |
4 |
Formula: |
Now find the radius |
\$r = d/2\$ |
5 |
Step |
Substitute the given values in the formula |
\$r = 15 /2\$ |
6 |
Step |
After simplification |
r = 7.5 cm |
7 |
Step |
Now substitute the radius in area formula |
\$ A = π times (7.5)^2\$ |
8 |
Step |
After simplification |
\$A = 176.625 cm^2\$ |
9 |
Step |
The area of the circle is 176.625 sq.cm |
|
10 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
|
11 |
Choice.A |
This is not correct because the area is calculated in square centimeters, not square meters |
\$176.625 m^2\$ |
12 |
Choice.B |
This is correct because it represents the calculated area of the circle in square centimeters |
\$176.625 cm^2\$ |
13 |
Choice.C |
This is not correct because it does not represent the calculated area of the circle in square centimeters, but the units are same |
\$23.55 cm^2\$ |
14 |
Choice.D |
This is not correct because the area is calculated in square centimeters, not square meters |
\$23.55 m^2\$ |
15 |
Answer |
Option |
B |
16 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
|
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