Question

the perimeter of a triangle is 64cm Two of its sides measures 15cm and 26cm find the length of 3rd side of the triangle ​

Answer 1

Answer :

Third side = 23cm

Step-by-step explanation :

Here, perimeter is the total sum of length of a triangle.

Perimeter of this triangle is 64 cm

Two of the sides are 15cm and 26cm

let, the third side be 'x'

So, we got an equation to compute, i.e :

15cm + 26cm + x = 64 cm

→ 41 + x = 64cm

→ x = 64 - 41

→ x = 23 cm

∴ the 3rd side of this triangle is 23 cm

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Answer 2

Answer:

$\boxed { 23 cm }$  

Step-by-step explanation:

Given :

• Perimeter of Triangle = 64cm
• Measures of  two sides = 15cm and 26cm

To Find:

Length of 3rd side of the triangle = ?

Let the third side be x

SOLUTION:

$\boxed{Perimeter. of. Triangle = Sum .of .the. 3. sides .of. Triangle}$

⇒ 64cm = 15cm +  26cm + x

⇒64cm = 41cm + x  

⇒64cm - 41cm = x  

⇒$\boxed{x = 23cm}$

∴Length of 3rd side of the triangle =$\boxed { 23 cm }$  

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