Question

in the following figure ABC= 90 and BD/ ac if AD= 8cm CD= 2 cm find the length of BD ​

Answer 1

${ 90}^{2} = {8}^{2} - {2 }^{2} \\ 8100 = 64 - 4 \\ 8100 = 60 \\ 8100 \div 60 \\ 135$