GMAT Practice Test 1 - Q2

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Can anyone please help with the below ?

[pemdas]

apply the outer angle rule for triangles
you need to find prs-pqr? correct?

now if you look into the outer angle prs=qpr+pqr, hence (qpr+pqr)-pqr=qpr which is 30`

since both statements supply you with the same information both are Sufficient in itself.

d

[GMATGuruNY]

I posted an alternate approach here:

https://www.beatthegmat.com/gmat-prep-ge ... 77074.html