Answer:
Step by-step explanation:
use [tex]a^{2} \\[/tex]+[tex]b^{2}[/tex]=[tex]c^{2}[/tex]
for a we will use the difference in x values. the distance between 7 and 7 is 0
for B we use the distance between y values. the distance between 8 and -20 is 28.
[tex]0^{2}[/tex]+[tex]28^{2}[/tex]=[tex]c^{2}[/tex]
[tex]28^{2}[/tex]=[tex]c^{2}[/tex]
784=[tex]c^{2}[/tex]
the square roof of 784=28 so the answer is 28
