Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Find the length and perimeter |
Grade: 6-a Lesson: S2-L4 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Calculate the perimeter of the below sector |
|
2 |
Step |
The given values |
θ = 130º and r = 10 cm |
3 |
Formula: |
Arc length |
\$A = θ /(360º) times 2π times r\$ |
4 |
Step |
Substitute the given values in the formula |
\$A = (130)/(180) times 2π times 10\$ |
5 |
Step |
After simplification |
\$A = 0.36 times 2 times 3.14 times 10\$ |
6 |
Step |
After simplification |
A = 22.68 cm |
7 |
Formula: |
Perimeter of sector |
Arc length + 2r |
8 |
Step |
Substitute the given values in the formula |
\$22.68 + 2 times 10\$ |
9 |
Step |
After simplification |
42.68 cm |
10 |
Step |
The perimeter of a sector is 42.68 cm |
|
11 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
|
12 |
Choice.A |
This is not correct because it does not match the calculated perimeter of the sector |
40 .68 cm |
13 |
Choice.B |
This is not correct because it does not match the calculated perimeter of the sector |
32.68 cm |
14 |
Choice.C |
This is not correct because it does not match the calculated perimeter of the sector |
22.68 cm |
15 |
Choice.D |
This is correct because it match the calculated perimeter of the sector |
42.68 cm |
16 |
Answer |
Option |
D |
17 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
|
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