How can I understand geometry in order to solve the following?

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Oct 31st, 2015

Thank you for the opportunity to help you with your question!

12x-20 + 110=360

12x+90=360

12x=360-90

12x=270

x=270/12

=22.5

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 31st, 2015

The angle PLA is twice that at PDA(the larger angle).

110 x 2=220

Therefore, we will have 12x-20=220

12x=220+20

12x=240

x=20

The answer is C.

Kindly ignore the first approach.

Oct 31st, 2015

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