Question

please give me correct answer i will mark you as brainlist
class6th ​

Answer 1

Answer:

Third side = 75cm

Step-by-step explanation:

Perimeter of the triangle

= 240cm

Let the unknown side be x

Then,

75 + 90 + x = 240

165 + x = 240

x = 75 cm

Hope it helps:)

Answer 2

Answer:

Step-by-step explanation:

$\rm let\:the\: sides \: a,b\:and\:c$

$\sf a+b+c= 240\:cm$

$\sf 75+90+c= 240\:cm$

$\sf 165+c= 240\:cm$

$\sf c= 240-165$

$\sf c= 75\:cm$