Question

The length of the hypotenuse of an isoceles right triangle whose leg is one unit

Answer 1

The answer may be 1.4. Isosceles triangles have 2 equal sides. Since you know the measure of one, you know both legs.
1^2+1^2=c^2
1+1=c^2
√2=c
c=1.4
Remember the hypotenuse must be bigger than the legs.