Question

In triangle ABC, right angled at c, If AB=15cm and BC =12 cm ,find the length of AC​

Answer 1

Answer:

use Pythagoras theorem..

\begin{gathered}{ac}^{2} + {bc}^{2} = {ab}^{2} \\ {9}^{2} + {12}^{2} = {ab}^{2} \\ 81 + 144 \: = {ab}^{2} \\ thus \: ab \: = \: 15 \: cm\end{gathered}

ac

2

+bc

2

=ab

2

9

2

+12

2

=ab

2

81+144=ab

2

thusab=15cm