Respuesta :
There is a picture provided below and you can clearly see that AC ⊥ BD. Since AC is the base line and BD are put on the opposite ends, there is no more explanation needed but the drawing and the given itself.

There is a picture provided below and you can clearly see that AC ⊥ BD. Since AC is the base line and BD are put on the opposite ends, there is no more explanation needed but the drawing and the given itself.