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Step-1

Title: Angles

Grade: 6-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	Find missing angle x in the figure.
2	Step	we ∠x + 25° = 90°
3	Step	Subtract 25° on both sides	⇒ ∠x + 25° - 25° = 90° - 25° ⇒ ∠x = 65°
4	Step	So,the ∠x is 65°.
5	SumUp	Can you summarize what you’ve understood in the above steps?
6	Choice.A	This matches the solution and is consistent with the angle calculated in the solution	65°
7	Choice.B	This does not matches the solution and is consistent with the angle calculated in the solution	70°
8	Choice.C	This is not the correct answer. The original equation is ∠x + 25° = 90°, and the solution found ∠x to be 65°, not 90°	90°
9	Choice.D	This does not matches the solution and is consistent with the angle calculated in the solution	110°
10	Answer	Option	A
11	SumUp	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Find missing angle x in the figure.

Step

we ∠x + 25° = 90°

Step

Subtract 25° on both sides

⇒ ∠x + 25° - 25° = 90° - 25°

⇒ ∠x = 65°

Step

So,the ∠x is 65°.

SumUp

Can you summarize what you’ve understood in the above steps?

Choice.A

This matches the solution and is consistent with the angle calculated in the solution

65°

Choice.B

This does not matches the solution and is consistent with the angle calculated in the solution

70°

Choice.C

This is not the correct answer. The original equation is ∠x + 25° = 90°, and the solution found ∠x to be 65°, not 90°

90°

Choice.D

This does not matches the solution and is consistent with the angle calculated in the solution

110°

Answer

Option

SumUp

Can you summarize what you’ve understood in the above steps?