Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Angles(Interior & Exterior) |
Grade: 4-a Lesson: S2-L2 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
What is the sum of interior angles of a 12-sided polygon? |
|
2 |
Formula |
Sum of Interior Angles is |
\$(n - 2) \times 180 "degrees"\$ |
3 |
Hint |
Where n is the number sides. |
|
4 |
Step |
Number of sides is |
12 |
5 |
Step |
Substitute the values |
\$(12 - 2) \times 180°\$ |
6 |
Step |
After simplification |
⇒ \$10 \times 180\$ ⇒ 1800° |
7 |
Step |
So, the sum of the interior angles of a 12-sided polygon is 1800°. |
|
8 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
9 |
Choice.A |
This is correct because it gives the correct sum of interior angles for a 12-sided polygon |
1800 degrees |
10 |
Choice.B |
This is not correct because it does not match the sum of interior angles for a 12-sided polygon |
1200 degrees |
11 |
Choice.C |
This is not correct because it does not match the sum of interior angles for a 12-sided polygon |
1208 degrees |
12 |
Choice.D |
This is not correct because it does not match the sum of interior angles for a 12-sided polygon |
1100 degrees |
13 |
Answer |
Option |
A |
14 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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