Lesson Example Discussion Quiz: Class Homework |
Step-4 |
Title: Angles |
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 |
What is the sum of interior angles for a 20-gon? |
|
2 |
Step |
The number of sides is |
20 |
3 |
Formula |
Sum of the interior angles of a polygon, you can use the formula: |
\$(n - 2) \times 180 degrees\$ |
4 |
Step |
Now plug the values into the formula |
⇒ \$(20 - 2) \times 180 "degrees"\$ ⇒ \$18 \times 180 "degrees"\$ = 3240 degrees |
5 |
Step |
So, the sum of the interior angles for a 20-gon is 3240 degrees. |
|
6 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
7 |
Choice.A |
This is not correct because it does not match the calculated sum for a 20-gon |
3244 degrees |
8 |
Choice.B |
This is correct because it represents the correct sum of interior angles for a 20-gon |
3240 degrees |
9 |
Choice.C |
This is not correct because it does not match the calculated sum for a 20-gon |
3215 degrees |
10 |
Choice.D |
This is not correct because it does not match the calculated sum for a 20-gon |
4240 degrees |
11 |
Answer |
Option |
B |
12 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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