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PLEASE HELPP i know the answer is 12 but how?

PLEASE HELPP i know the answer is 12 but how?
asked 168 views
14 votes
PLEASE HELPP i know the answer is 12 but how?

PLEASE HELPP i know the answer is 12 but how?-example-1
asked
User Constantin Galbenu
by
7.8k points

1 Answer

1 vote
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
answered
User Invader Zim
by
7.7k points
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