Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Computing Perimeter of Rectangle |
Grade: 2-a Lesson: S1-L7 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Perimeter of a rectangle is 40 cm. The width is 5 cm. The length is __. |
|
2 |
Step |
The perimeter(p) of a rectangle is given, |
40 cm |
3 |
Step |
The width(w) of a rectangle is given, |
5 cm |
4 |
Step |
To find the length(l) of a rectangle is to simplify the length and perimeter in the given formula. |
p = 2(l + w) |
5 |
Formula |
The formula for finding the width of a rectangle is |
l = \$P/2\$ - w |
6 |
Step |
Substitute the values by using width formula is |
l = \$40/2\$ - 5 |
7 |
Step |
After simplification |
l = 20 - 5 |
8 |
Step |
After subtraction |
l = 15 |
9 |
Step |
The answer is |
15 |
10 |
Step |
The length of a rectangle is 15 cm. |
|
11 |
Answer |
B |
|
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