Think about the fact that you can have two types of isosceles triangle: one of them that is a right triangle (isosceles right triangle) such as a 45-45-90 triangle and the other type can be just a regular triangle that has two sides that are congruent but it isn't a right triangle.
Thus, you would need more info about the triangles in order to conclude that the two isosceles triangles are congruent to each other.
are you still stuck on the question
ANSWER
(I multiplied by 12 on both sides to get a whole number)
There are 12 inches in 1 foot.
Divide 46 inches by 12 inches to get how many feet there are.
46/12 = 3.83
46 inches is about 3.83 feet.
