The lengths of tw

Formula Used/Theory:-

Perimeter = sum of all sides of triangle

There can be 2 cases

(i) If equal sides in isosceles triangle is equal to 9cm

Then;

Perimeter = 9cm + 9cm + 20cm

= 38cm

(ii) If equal sides in isosceles triangle is equal to 20cm

Then;

Perimeter = 20cm + 20cm + 9cm

= 49cm

∴ perimeter of triangle can be either 38cm or 49cm

Result:- Perimeter of triangle is either 38cm or 49cm.