Question

in tri ABC AB=5 BD=3 DC=4 find the lenght of AC
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Answer 1

Answer:

AB sq = AD sq + BD sq

5 sq = AD sq + 3 sq

25 = AD sq + 9

AD sq = 25 - 9

AD sq = 16

AD = 4

Now, we can find AC also by Pythagoras theorem.

AC sq = AD sq +DC sq

AC sq = 16 + 16

AC sq = 32

AC = 5.12(approximately)