Question

the ladder is 2.5 m away from the wall, find the length of the ladder.
10. In the given figure, AB and AC are tangents to the circle with centre O such that
ZBAC = 40°. Then calculate ZBOC.
B
A 40°
o
C​

Answer 1

Answer:

Option C

Step-by-step explanation:

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