Respuesta :
answer is: a/(1/2b+1/2c)=h
a=1/2(b+c)h
a=(1/2b+1/2c)h
a/(1/2b+1/2c)=(1/2b+1/2c)b / (1/2b+1/2c)
a/(1/2b+1/2c)=h
a=1/2(b+c)h
a=(1/2b+1/2c)h
a/(1/2b+1/2c)=(1/2b+1/2c)b / (1/2b+1/2c)
a/(1/2b+1/2c)=h