Question

1. What's the size of ∠ABC shown in the above figure?

Answer 1

Answer:

Option D

m∠ABC=$35\°$

Step-by-step explanation:

we know that

The inscribed angle measures half that of the arc comprising

In this problem

m∠ABC is the inscribed angle

so

m∠ABC=$\frac{1}{2}(arc\ AC)$

$arc\ AC=70\°$ -------> by central angle

substitute

m∠ABC=$\frac{1}{2}(70\°)=35\°$

Answer 2

It's not enough details to solve this task but I think I've got it right. Size of OAB = AOC then ABC is D. 35.