Lesson Example Discussion Quiz: Class Homework |
Step-4 |
Title: Computing Perimeter of Triangle |
Grade: 2-a Lesson: S1-L8 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
If the perimeter of a triangle is 20 feet and two of the side lengths are 11 feet and 4 feet, what is the length of the third side? |
|
2 |
Definition: |
The sum of squares of two sides is equal to the square of the third side. |
|
3 |
Step |
The perimeter of a triangle is |
20 feet |
4 |
Step |
The two lengths of a triangle is |
11 feet and 4 feet |
5 |
Step |
Then the length of the third side is |
? |
6 |
Step |
To find the third side of a triangle, you simply add the two given sides of the triangle together and subtract the two sides result with the perimeter. |
|
7 |
Step |
The addition of two sides are |
11 + 4 = 15 |
8 |
Step |
Perimeter of a triangle - result of two sides |
20 - 15 |
9 |
Step |
Then the answer is |
5 |
10 |
Step |
The length of the third side is 5 feet. |
|
11 |
Answer |
B |
|
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