Question

please solve the question.
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Answer 1

Answer:

10 cm

Step-by-step explanation:

let the fourth side be x

now , perimeter = sum of all side

then ,  26 cm = 5 + 2 + 9 + x

            26 cm = 16 + x

           26 - 16 = x

             10 cm = x

hope it helps you very well

Answer 2

2+9+5= 16

the perimeter= 26

so we will do , 26-16= 10

therefore to check ,

we can add : like;

2+9+5+10=26