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avatar+79 

i really need help 

 Jan 12, 2022
 #1
avatar+36453 
+1

19.      122 + b2  = 202

 

20.     5+  102   =   25   + 100  = 125 = c2           ( 'c' then = sqrt (125)  )

 Jan 12, 2022
 #2
avatar+361 
0

ok,

According to the Pythagorean Thereom,

\(12^2+b^2=20^2\)

\(144+b^2=400\)

\(b^2=256\)

\(b=16\)

This is for 19.

 

 

 \(25+100=125\)

\(\sqrt125=15\)

so 15 for number 20

 Jan 13, 2022
 #3
avatar+118117 
0

since when is the square root of 125 = 15?

Melody  Jan 13, 2022
 #4
avatar+361 
+1

waitwaitwait.

\(\sqrt125\)

\(5\sqrt5\)

oops. um...

 Jan 14, 2022

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