Question

Perimeter of a triangle is the sum of the lengths of all the _____ sides.

• A. $2$
• B. $4$
• C. $5$
• D. none of these

Answer 1

The correct option is D none of these

$\Rightarrow$ Perimeter of a triangle is the sum of the lengths of all the $3$ sides.

$\Rightarrow$ In figure, ABC is a triangle.

$\Rightarrow$ Perimeter of $△ABC=AB+BC+CA$

$\therefore$ Perimeter of a triangle is the sum of the lengths of all the three sides.