Lesson Example Discussion Quiz: Class Homework |
Step-2 |
Title: Geometry |
Grade: Core-SAT3 Lesson: S3-P2 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Determine the total 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: |
Total surface area of a cone (A) is |
A = \$πr(r + l)\$ |
4 |
Step |
Substitute the values into the formula |
\$"A" = 3.14 times 8(8 + 14)\$ \$"A" = 3.14 times 8(22)\$ \$"A" = 552.64\$ |
5 |
Step |
So,the total surface area of a cone (A) is \$552.64(cm)^2\$. |
|
6 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
|
7 |
Choice.A |
It is correct option for total surface area of cone using given radius and slant height |
\$552.64(cm)^2\$ |
8 |
Choice.B |
This is lower than the correct value, so it’s incorrect |
\$550.01(cm)^2\$ |
9 |
Choice.C |
This is also lower than the correct value, so it’s incorrect |
\$551(cm)^2\$ |
10 |
Choice.D |
This is higher than the correct value, so it’s incorrect |
\$552.14(cm)^2\$ |
11 |
Answer |
Option |
A |
12 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
|
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