Lesson Example Discussion Quiz: Class Homework |
Step-5 |
Title: Angle(Types of angles) |
Grade: 4-a Lesson: S2-L1 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
The measure of two complementary angles are (3x - 5)° and (x + 15)°. Find the value of x. |
|
2 |
Step |
The first angle is |
(3x - 5)° |
3 |
Step |
The second angle is |
(x + 15)° |
4 |
Step |
The sum of complementary angle is |
90° |
5 |
Step |
So, we can set up an equation: |
(3x - 5) + (x + 15) = 90° |
6 |
Step |
Now, you can solve for x |
3x - 5 + x + 15 = 90 4x + 10 = 90 |
7 |
Step |
subtract 10 on both sides |
4x + 10 -10 = 90 - 10 4x = 80 |
8 |
Step |
Divide 4 on both sides |
\$(4x)/4\$ = \$80/4\$ |
9 |
Step |
So, the value of x is 20. |
|
10 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
11 |
Choice.A |
This is not correct because it does not satisfy the equation when substituted into the expressions for the angles |
25 |
12 |
Choice.B |
This is not correct because it does not satisfy the equation when substituted into the expressions for the angles |
30 |
13 |
Choice.C |
This is correct because it satisfy the equation when substituted into the expressions for the angles |
20 |
14 |
Choice.D |
This is not correct because it does not satisfy the equation when substituted into the expressions for the angles |
45 |
15 |
Answer |
Option |
C |
16 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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