bjbjj30
bjbjj30
12-03-2021
Mathematics
contestada
PLEASE HELPP i know the answer is 12 but how?
Respuesta :
maccabee678
maccabee678
12-03-2021
a^2+b^2=c^2
a^2+9^2=15^2
a^2+81=225
-81 -81
a^2= 144 (square root both sides)
a=12
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