Answer:
45
Step-by-step explanation:
The formula for finding the longest size of a right angle is
[tex]c^{2} = a^{2} + {b}^{2}[/tex]
a = 28, b = ? and c = 53;
Therefore, if you make b the subject of the formula, you will have
[tex]b = \sqrt{ {c}^{2} - {a}^{2} } [/tex]
And after plugging the value of c=53 and a=28, b is gotten to be 45
