Question

Please help please I need help

Answer 1

Answer:

hi

Step-by-step explanation:

we can do this with Pthyagorean teorem

${12}^{2} + {x}^{2} = {15}^{2} \\ 144 + {x}^{2} = 225 \\ {x}^{2} = 225 - 144 \\ {x}^{2} = 81 \\ x = \sqrt{81} \\ x = 9 \: cm$

BC is 9

hope it helps

have a nice day

Answer 2

Answer:

9

Step-by-step explanation:

9 squared + 12 squared= 15 squared