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Title: Computing Perimeter of Triangle

Grade: 2-a Lesson: S1-L8

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Calculate the perimeter of an equilateral triangle if its side measures 3 cm.
2	Definition:	In an equilateral triangle, all the three sides are equal in length,the perimeter is equal to three times the length of a side.
3	Step	The side of a triangle is	3 cm
4	Step	All sides are equal in an equilateral triangle, so all three sides are 3 cm.
5	Formula	The perimeter of a triangle is	P = 3a
6	Step	Here, a is the side of a triangle.
7	Step	Simplification	P = 3 x 3
8	Step	Simplification	9
9	Step	Then the perimeter of a triangle is 9 cm.
10		Answer	B

Step

Type

Explanation

Answer

Problem

Calculate the perimeter of an equilateral triangle if its side measures 3 cm.

Definition:

In an equilateral triangle, all the three sides are equal in length,the perimeter is equal to three times the length of a side.

Step

The side of a triangle is

3 cm

Step

All sides are equal in an equilateral triangle, so all three sides are 3 cm.

Formula

The perimeter of a triangle is

P = 3a

Step

Here, a is the side of a triangle.

Step

Simplification

P = 3 x 3

Step

Simplification

Step

Then the perimeter of a triangle is 9 cm.

Answer