Question

an isoscles triangles has perimeter 30cm and each of the equal sides is 12cm.​

Answer 1

Step-by-step explanation:

perimeter=30 cm

as we know that there are two equal sides in an isosceles triangle

now,

let the third side be x

A.T.Q

12+12+x=30

24+x=30

x=6

Answer 2

Answer:

Bro Pls see it below

Step-by-step explanation:

That means the third side is equal x

Perimeter= 30 cm = equal sides + third side

Therefore we make a equation

2 sides +third side= 30

put value of equal sides

2x 12 + X=30

X=30-24

=6

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I am in 8th class