what is the value of a

Answer:
b = 10
Step-by-step explanation:
In this question we have identified that b ( or short leg ) = 5 https://brainly.com/question/23589050
In the image provided in that question the, we are told that the hypotenuse = short leg times 2
If we have identified that the short leg = 5 then the hypotenuse = 5 * 2 which is equal to 10