Question

In the figure below, is the centre of the circle and AB is a diameter. C'is a point on the circle C 50 B i) Compute ​

Answer 1

Answer:

Given that:

∠DOB=80∘

,∠DBC=30∘

To find:

∠ACB=?

Solution:

Since, AB is a diameter.

So, ∠ADB=90∘

∠ADB+∠BDC=180∘

(Linear pair)

or, ∠BDC=180∘ − 90∘

=90∘

In △BDC

∠BDC+∠DBC+∠DCB=180∘

or, 90∘

+30∘

+∠DCB=180∘

or, ∠DCB=180∘ −120∘

=60∘

∴∠ACB=∠DCB=60∘

Step-by-step explanation:

Answer 2

Answer:

Your answer is ABC = DCB = 60°

Hope it will help you