Lesson Example Discussion Quiz: Class Homework |
Step-2 |
Title: Perimeter of Triangle(based on sides) |
Grade: 4-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 |
An isosceles triangle has a base of length 6 cm, and the two equal sides are each 5 cm long. What is the perimeter of the triangle? |
|
2 |
Formula |
Perimeter of a isosceles triangle is |
P = 2a + b |
3 |
Hint |
In this triangle the two sides are equal, so here 5cm is the two sides of an isosceles triangle. |
|
4 |
Step |
The base length of a triangle with two equal sides is |
5 cm |
5 |
Step |
The base length of a triangle sides is |
6 cm |
6 |
Step |
Substitute the values |
P = 2(5) + 6 |
7 |
Step |
After Simplification |
P = 10 + 6 |
8 |
Step |
After Simplification |
P = 16 |
9 |
Step |
Then the perimeter of an isosceles triangle is 16 cm. |
|
10 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
11 |
Choice.A |
This is not correct because it seems to have added the lengths of all sides instead of just the two equal sides and the base |
20 cm |
12 |
Choice.B |
This is the correct answer for the perimeter of the isosceles triangle |
16 cm |
13 |
Choice.C |
This is not correct because it seems to have added the lengths of all sides instead of just the two equal sides and the base |
22 cm |
14 |
Choice.D |
This is not correct because it seems to have added the lengths of all sides instead of just the two equal sides and the base |
24 cm |
15 |
Answer |
Option |
B |
16 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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