Question

in a right triangle ABC, \b = 90, AC =13 ,NC =5 find ab

Answer 1

If NC =BC

then,

By Pythagoras theorem,

13²=5²+ab²

169-15=ab²

144=ab²

12=ab


I hope this much will help you

Answer 2

By Pythagoras Theorem
ab2+bc2=ac2
ab2=ac2-bc2
ab2=13square-5square
ab2=169-25
ab=12cm