Question

the perimeter of a triangle is 18 cm. if its two sides are equal and the third is of 8cm. find the measure of its two sides​

Answer 1

Answer:

5 cm

Step-by-step explanation:

let the equal two sides are of length x cm.

Perimeter of ∆= sum of all sides

18 = x+x+8

18-8=2x

10 =2x

10/2 = x

5=x

ANS. MEANSURE OF EACH EQUAL SIDE IS 5 cm

Answer 2

Answer:

The measure of both sides are 5 cm

Step-by-step explanation:

Given :

Perimeter of the triangle = 18 cm

Length of its third side = 8 cm

To find :

The length of 1st and 2nd side

Taken :

To find the length both side use this equation -:

$\boxed{\sf{L=\dfrac{P-T}{2}}}$

Where,

L = Length of both sides

P = Perimeter

T = Length of third side

Solution :

$:\implies\sf{L=\dfrac{18cm-8cm}{2}}$

$:\implies\sf{L=\dfrac{\cancel{10}cm}{\cancel{2}}}$

$:\implies\sf{L=5cm}$

So , the both sides are of 5 cm each .

(It is a isosceles triangle)