Answer:
14 root 2
Step-by-step explanation:
This triangle is a 45:45:90 degree triangle, so the ratio in the sides should be 1:1:root 2 if a:b:c. By using that ratio, we know that 1 is to b and root 2 is to 28. So, the answer can be found by dividing 28 by root 2. Simplify for 14 root 2.