Question

12. Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle
is 36 cm. What is its third side? ?​

Answer 1

Answer:

perimeter=s+s+s

36=12+14+S

12+14= 26+s

36-26=10

third side = 10 cm

Answer 2

Question:-

Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is its third side?

Answer:-

• The third side of triangle is 10 cm.

To find:-

• Third side of triangle

Solution:-

• First side = 12 cm
• Second side = 14 cm
• Let the third side be 'x'.
• Perimeter = 36 cm

$\red{ \bold{ \boxed{ \blue{ \large{perimeter = sum \: of \: all \: sides}}}}}$

$\large{: \implies \: 12 + 14 + x = 36}$

$\large{: \implies \: 26 + x = 36}$

$\large{: \implies \: x = 36 - 26}$

$\large{: \implies \: x = 10 \: cm}$

Hence,

• The third side of triangle is 10 cm.