Is it possible to construct a triangle given the following lengths? 10 inches, 10 inches, 15 inches

Answer 1

Yes.

to be a triangle, each side must be greater than the difference between the other 2 sides

and less than the sum of the other 2 sides

15 is greater than 10-10

15 is less than 10+10

10 is greater than 15-10

10 is less than 10+15

a 20-10-10 triangle is impossible

a 15-10-5 is impossible

but a 10-10-15 is very possible