Lesson Example Discussion Quiz: Class Homework |
Step-4 |
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 |
A right triangle is inscribed inside a circle of radius 10 cm such that one of the perpendicular sides of the triangle is the diameter of the circle and the other perpendicular side is \$2/5\$th the radius of the circle. Find the area of the triangle. |
|
2 |
Step |
The radius of a circle is given(r) |
10 cm |
3 |
Formula |
Diameter of the triangle |
2r |
4 |
Step |
Substitute the values |
2(10) = 20 cm |
5 |
Step |
Length of one perpendicular side of triangle |
20 cm |
6 |
Step |
Length of the other perpendicular side |
\$2/5 \times 10 = 20/5\$ |
7 |
Step |
After division the value we get, |
4 cm |
8 |
Formula |
Area of the triangle = \$1/2 \times "base" \times "height"\$ |
|
9 |
Step |
Substitute the values to find the area by using area of triangle formula |
A = \$(1/2) \times 20 \times 4\$ |
10 |
Step |
After simplification |
A = \$(1/2) \times 80\$ |
11 |
Step |
After division the value we get, |
A = 40 sq.cm |
12 |
Step |
So,the Area of a triangle is \$40 cm^2\$. |
|
13 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
14 |
Choice.A |
This is correct because it match the correct calculation |
40 sq.cm |
15 |
Choice.B |
This is not correct because it does not match the correct calculation |
20 sq.cm |
16 |
Choice.C |
This is not correct because it does not match the correct calculation for the area |
13 sq.cm |
17 |
Choice.D |
This is not correct because it does not match the correct calculation |
15 sq.cm |
18 |
Answer |
Option |
A |
19 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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