Question

the side of a triangle klm=7cm ,Lm=3cm and KM =12cm then find the semi perimeter​

Answer 1

Before, finding the answer. Let's find out how we can find the answer.

• Here, in this question, we are asked to find the Semi-Perimeter.
• So, to find the Semi-Perimeter, we must use the formula of :

$\boxed{ \tt Semi-Perimeter = \dfrac{a + b + c}{2} }$

Here, we have to add all three sides first. Then, we must divide it by 2.

_________________

Given :

• A = 7 cm
• B = 3 cm
• C = 12 cm

To find :

• Semi-Perimeter

Solution :

We know that,

${ \tt Semi-Perimeter = \dfrac{a + b + c}{2} }$

                             $\tt = \dfrac{7 + 3 + 12}{2} }$

                             $\tt = \dfrac{10 + 12}{2} }$

                             $\tt = \dfrac{22}{2}$

                             $\tt = 11 cm$

Therefore, the Semi-Perimeter of the triangle is 11 cm.