Lesson Example Discussion Quiz: Class Homework |
Step-4 |
Title: Surface area for Prism & Sphere |
Grade: 6-a Lesson: S3-L3 |
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 pentagonal prism. Its height and apothem length are 12.5 in and 19.5 in, and base length is 14 in. |
|
2 |
Step |
The given values are |
h = 12.5 in , b = 14 in and a = 19.5 in |
3 |
Formula |
The total surface area of a pentagonal prism is |
\$"Total surface area" = 5"ab" + 5"bh"\$ |
4 |
Step |
Now plug the values in the formula |
\$"Total surface area" = 5 times 19.5 times 14 + 5 times 14 times 12.5\$ |
5 |
Step |
After simplification |
\$"Total surface area" = 1365 + 875\$ |
6 |
Step |
Make it simpler |
Total surface area = 2240 sq.in |
7 |
Step |
Therefore the total surface area of a pentagonal prism is 2240 sq.in. |
|
8 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
9 |
Choice.A |
This is correct due to accurately done the calculation by using the formula |
2240 sq.in |
10 |
Choice.B |
This is not correct because it doesn’t correctly calculate |
2420 sq.in |
11 |
Choice.C |
This is not correct because it doesn’t correctly calculate |
2204 sq.in |
12 |
Choice.D |
This is not correct because it doesn’t correctly calculate |
2402 sq.in |
13 |
Answer |
Option |
A |
14 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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