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Title: Perimeter of Triangle(based on sides)

Grade: 4-a Lesson: S1-L7

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Find the Perimeter of a triangle.
2	Formula	The perimeter of a triangle is	P = a + b + c
3	Step	The sides of a triangle are	15 ft, 16 ft,12 ft
4	Step	Substitute the values	P = 15 + 16 + 12
5	Step	Simplification	P = 43
6	Step	Then the perimeter of a triangle is 43 ft.
7	SumUp	Can you summarize what you’ve understood in the above steps?
8	Choice.A	This is incorrect answer for the perimeter of the isosceles triangle	40 ft
9	Choice.B	This is incorrect answer for the perimeter of the isosceles triangle	42 ft
10	Choice.C	This is the correct answer for the perimeter of the isosceles triangle	43 ft
11	Choice.D	This is incorrect answer for the perimeter of the isosceles triangle	45 ft
12	Answer	Option	C
13	SumUp	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Find the Perimeter of a triangle.

Formula

The perimeter of a triangle is

P = a + b + c

Step

The sides of a triangle are

15 ft, 16 ft,12 ft

Step

Substitute the values

P = 15 + 16 + 12

Step

Simplification

P = 43

Step

Then the perimeter of a triangle is 43 ft.

SumUp

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

Choice.A

This is incorrect answer for the perimeter of the isosceles triangle

40 ft

Choice.B

This is incorrect answer for the perimeter of the isosceles triangle

42 ft

Choice.C

This is the correct answer for the perimeter of the isosceles triangle

43 ft

Choice.D

This is incorrect answer for the perimeter of the isosceles triangle

45 ft

Answer

Option

SumUp

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