Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Area of 3D shapes |
Grade: 8-a Lesson: S1-L6 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Determine the curved surface area of a cone whose base radius is 8 cm and slant height is 14 cm.Use π value is 3.14 |
|
2 |
Step |
Given that the height (h) is radius(r) is |
h = 14 cm, r = 8 cm |
3 |
Formula: |
The curved surface area of a cone (A) is |
A = \$πr(r + l)\$ |
4 |
Step |
Substitute the values |
\$3.14*8(8+14)\$ \$3.14 * 8 (22)\$ |
5 |
Step |
So,the curved surface area of a cone (A) is |
\$552.64(cm)^2\$ |
6 |
Answer |
A |
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