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Step-1

Title: Angles

Grade: 4-a Lesson: S3-L1

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Identify the type of triangle.
2	Step	The given image shows the acute triangle.
3	Step	If all three angles are less than 90 degrees, the triangle is an Acute Triangle.
4	Hint	An acute angle is any angle less than 90 degrees.
5	Step	Compare the given options with the definition of acute triangle.
6	Step	So the given image shows the acute triangle.
7	Sumup	Can you summarize what you’ve understood in the above steps?
8	Choice.A	This is incorrect because All three sides are of equal length	Equilateral triangle
9	Choice.B	This is incorrect because At least two sides are of equal length	Isosceles triangle
10	Choice.C	This is incorrect because A right angle is an angle that is exactly equal to 90 degrees	Right triangle
11	Choice.D	This is correct because If all three angles are less than 90 degrees, the triangle is an Acute Triangle	Acute triangle
12	Answer	Option	D
13	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Identify the type of triangle.

Step

The given image shows the acute triangle.

Step

If all three angles are less than 90 degrees, the triangle is an Acute Triangle.

Hint

An acute angle is any angle less than 90 degrees.

Step

Compare the given options with the definition of acute triangle.

Step

So the given image shows the acute triangle.

Sumup

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

Choice.A

This is incorrect because All three sides are of equal length

Equilateral triangle

Choice.B

This is incorrect because At least two sides are of equal length

Isosceles triangle

Choice.C

This is incorrect because A right angle is an angle that is exactly equal to 90 degrees

Right triangle

Choice.D

This is correct because If all three angles are less than 90 degrees, the triangle is an Acute Triangle

Acute triangle

Answer

Option

Sumup

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