Question

what is the value of 'a'​

Answer 1

Answer:

$a = 9 \: m$

Step-by-step explanation:

$by \: pythagorus \: theorem \\ \\ {15}^{2} = {a}^{2} + {12}^{2} \\ \\ {a}^{2} = {15}^{2} - {12}^{2} \\ \\ {a}^{2} = 225 - 144 \\ \\ {a}^{2} = 81 \\ \\ a = \sqrt{81} \\ \\ a = 9 \: m.$