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Step-2

Title: Perimeter of Traiangle

Grade: 8-a Lesson: S1-L3

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	If two sides of a triangle are 9 cm and 6 cm and its perimeter is 26 cm.Find the third side of the triangle.
2	Step	Given, Perimeter(P) is side 1(a) is side 2(b) is	\$26\$cm \$9\$cm \$6\$cm
3	Formula:	Perimeter of Triangle (P)	P = \$a+b+c\$
4	Step	Substitute the values	\$26 = 9 + 6 + c\$
5	Step	Here,we are finding the "c" value	\$c = 26 - 15 \$ \$c = 11\$cm
6	Step	Therefore, the third side(c) of a triangle is	\$11\$ cm
7		Answer	B

Step

Type

Explanation

Answer

Problem

If two sides of a triangle are 9 cm and 6 cm and its perimeter is 26 cm.Find the third side of the triangle.

Step

Given, Perimeter(P) is
side 1(a) is
side 2(b) is

\$26\$cm
\$9\$cm
\$6\$cm

Formula:

Perimeter of Triangle (P)

P = \$a+b+c\$

Step

Substitute the values

\$26 = 9 + 6 + c\$

Step

Here,we are finding the "c" value

\$c = 26 - 15 \$
\$c = 11\$cm

Step

Therefore, the third side(c) of a triangle is

\$11\$ cm

Answer