29levelupchaye2
29levelupchaye2
13-01-2018
Mathematics
contestada
geometry help? AC=16, CD=5 Find BC
Respuesta :
tynollette
tynollette
13-01-2018
AD=AC-DC=16-5=11
BD=√DC*DA=√5*11=√55
BC²=CD²+BD²=5²+55=80
BC=√80=4√5
another way to do it: BC:AC=CD:CB, CB²=AC*CD=16*5=80, CB=√80=4√5
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