If O is the orthocentre of a triangle ABC and ∠BOC =

Home » Aptitude » Plane Geometry » Question

If O is the orthocentre of a triangle ABC and ∠BOC = 100°, the measure of ∠BAC is

We draw a figure triangle ABC whose O is the orthocentre ,

Given , ∠BOC = 180°
∠BOC = 100° – ∠A
⇒ ∠A = 180° – ∠BOC
∠A = 180° – 100° = 80°