Lesson Example Discussion Quiz: Class Homework |
Step-5 |
Title: Circle |
Grade: 4-a Lesson: S2-L3 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
The length of the largest chord of a circle is 20 units. Find the area of the circle.(π = 3.14) |
|
2 |
Step |
The length of the largest chord of a circle (D) is |
10 units |
3 |
Formula |
Area of a circle |
A = \$ π(r)^2\$ |
4 |
Step |
First,we need to find the radius value |
|
5 |
Formula |
The radius of a circle |
R = \$D/2\$ |
6 |
Step |
Substitute the values |
R = \$20/2\$ |
7 |
Step |
The radius of a circle is 10 cm. |
|
8 |
Step |
Substitute the values using Area of a circle formula |
A = \$ 3.14 \times (10)^2\$ A = \$ 3.14 \times 100\$ |
9 |
Step |
After multiplication the value we get, |
A = 314 |
10 |
Step |
So, the area of a circle is 314 sq.units. |
|
11 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
12 |
Choice.A |
The provided choice is incorrect, as it doesn’t align with the given options, and 73.5 is an inaccurate circle area |
73.5 sq.units |
13 |
Choice.B |
The answer aligns with this option, confirming that 78.5 sq. meters is the accurate value for a circle’s area |
78.5 sq.units |
14 |
Choice.C |
The provided choice is incorrect, as it doesn’t align with the given options, and 75.3 is an inaccurate circle area |
75.3 sq.units |
15 |
Choice.D |
The provided choice is incorrect, as it doesn’t align with the given options, and 77.6 is an inaccurate circle area |
77.6 sq.units |
16 |
Answer |
Option |
B |
17 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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