Answer:
the minimal number is 3
Step-by-step explanation:
Answer:

Step-by-step explanation:

Answer: b=2(square root of 2) and a=4
Step-by-step explanation:
Since this is a 45-45-90 triangle we know that side b is equal to
.
In a 45-45-90 triangle, the hypotenuse is equal to
this means in order to find missing side length a, we have to multiply
this will give us 4
so the missing side lengths are,
and 
The answer is the first one. You know because -4x x 5 is -20x and this option is the only one with -20x included.