Answer:
the answer is 90
Step-by-step explanation:
I got that by making an equation that looks like this 54^2+72^=c^2 then after that I I did the equation thing and the equation looked like this 2916+5184=c^2 then I added the two numberss together wich equals 8100 then after that I found the square root of 8100 and the answer was 90
