Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Area of Triangle(Based on Sides) |
Grade: 4-a Lesson: S2-L5 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Find the area and perimeter of an isosceles triangle given a = 8 cm (length of two equal sides), b = 11 cm (base) and height is 13.5 cm. |
|
2 |
Step |
The given values are |
a = 8 cm b = 11 cm and h = 13.5 cm |
3 |
Formula |
Area of triangle |
\$A = 1/2 times "base" times "height"\$ |
4 |
Formula |
Perimeter of a triangle |
P = 2a + b |
5 |
Step |
Substitute the value in the area formula |
\$A = 1/2 \times 11 \times 13.5\$ |
6 |
Step |
After simplification |
A = 74.25 sq.cm |
7 |
Step |
Substitute the value in the perimeter formula |
\$P = 2 \times 8 + 11\$ |
8 |
Step |
After simplification |
P = 16 + 11 |
9 |
Step |
After simplification |
P = 27 cm |
10 |
Step |
The area of the triangle and perimeter of the triangle are A = 74.25 sq.cm and P = 27 cm. |
|
11 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
12 |
Choice.A |
This is not correct because its values do not match the calculated ones |
P = 74.25 sq.cm and A = 27 cm |
13 |
Choice.B |
This is not correct because its values do not match the calculated ones |
P = 74.52 sq.cm and A = 26 cm |
14 |
Choice.C |
This is correct because it provides the accurate values for the area and perimeter of the given isosceles triangle |
A = 74.25 sq.cm and P = 27 cm |
15 |
Choice.D |
This is not correct because its values do not match the calculated ones |
A = 74.52 sq.cm and P = 26 cm |
16 |
Answer |
Option |
C |
17 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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