Lesson Example Discussion Quiz: Class Homework |
Step-5 |
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 |
Find the perimeter of an isosceles triangle with equal sides 6 cm each third side 3 cm. |
|
2 |
Definition: |
An isosceles triangle has two equal sides. The two opposite sides are equal. |
|
3 |
Formula |
The perimeter of an isosceles triangle is |
P = 2a + b |
4 |
Step |
The two sides of a triangle are |
6 cm |
5 |
Step |
The third side of a triangle is |
3 cm |
6 |
Step |
The perimeter of an isosceles triangle is |
P = 2a + b |
7 |
Step |
Simplification |
P = 2(6 + 3) |
8 |
Step |
Simplification |
P = 2(9) |
9 |
Step |
Simplification |
P = 18 |
10 |
Step |
Then the answer is |
18 |
11 |
Step |
The perimeter of an isosceles triangle is 18 cm. |
|
12 |
Answer |
B |
|
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