Circle theorem

[dull belfry]

I'm kind of struggling on finding the others

[thin chasm]

Just a matter of knowing your circle theorems, so D = 40° as they are alternate angles I believe it's called

[dull belfry]

But they are touching the same line tho

[normal rapids]

lines in the same segment are equal

is the theorem

[dull belfry]

In alternate segment theorem it doesnt show that the same line is touching both of them