Question

Please help me in this 2 questions

Answer 1

Answer:

Since (a−d).(b−c)=0, ∴DA.CB=0

∴AD⊥BC

Since (b−d).(c−a)=0,∴DB.AC=0

∴BD⊥CA.

Then D is the intersection of the altitudes through A and B.

Therefore, D is the orthocentre of the triangle ABC.

Step-by-step explanation:

ok..

hope it helps uhh