Question

In the figure, if AB and AC are tangents to a circle with

centre O.

If ∠BAC = 600 and AB = 7 cm, then BC = _________​

Answer 1

Answer:

Tangent is perpendicular to radius at point of contact.

So, ∠ABO=∠ACO=90

∘

In a quadrilateral, the sum of the angles is 360

∘

.

∠BAC+∠BOC+∠ABO+∠ACO=360

∘

∴∠BAC+∠BOC=180

∘

∠BOC=180

∘

−40

∘

∠BOC=140

∘

So, option C is the answer

Answer 2

Answer:

ask nise questions bro