Lesson Example Discussion Quiz: Class Homework |
Step-2 |
Title: Area of circle |
Grade: 7-a Lesson: S1-L2 |
Explanation: |
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
The radius of the circle is 12m. Find the area. |
|
2 |
Formula: |
Area of a circle. |
A = \$pi r^2\$ |
3 |
Step |
Substituting the terms. |
A = \$\frac(22)(7) (12)^2\$ |
4 |
Step |
Multiply. |
A = \$\frac(22)(7)\times(12)\times(12)\$ A = \$\frac(22)(7)\times(144)\$ A = \$\frac(22\times144)(7)\$ A = \$\frac(3168)(7)\$ |
5 |
Step |
Divide. |
A = \$\frac(3168)(7)\$ A = \$\cancel{3168}^452.57/\cancel{7}^1\$ A = 452.57 |
6 |
Answer |
The area is \$452.57m^2\$ |
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