Lesson Example Discussion Quiz: Class Homework |
Step-1 |
Title: Surface area of 3D shapes(sphere, prism, cylinder) |
Grade: 4-a Lesson: S3-L2 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
If the radius of a sphere is 16 feet, find its surface area. (Use π = 3.14) |
|
2 |
Step |
The given values are |
r = 16 ft and π = 3.14 |
3 |
Formula |
The surface area of sphere is |
\$A = 4πr^2\$ |
4 |
Step |
Now plug the values into the formula |
\$"A" = 4 times 3.14 times (16)^2\$ |
5 |
Step |
After simplification |
\$"A" = 4 times 3.14 times 256\$ |
6 |
Step |
After simplification |
A = 3215.36 sq.ft |
7 |
Step |
The surface area of the sphere is 3215.36 sq.ft. |
|
8 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
9 |
Choice.A |
This is correct because it correctly calculates the surface area of a sphere using the formula |
3215.36 sq.ft |
10 |
Choice.B |
This is not correct because it seems to have rounded the result incorrectly |
3251.36 sq.ft |
11 |
Choice.C |
This is not correct because it seems to have rounded the result incorrectly |
3215.63 sq.ft |
12 |
Choice.D |
This is not correct because it seems to have rounded the result incorrectly |
3251.63 sq.ft |
13 |
Answer |
Option |
A |
14 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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