Answer:
I'm scratching my head.
Your screenshot shows that you marked 'Wilson' as your answer, yet you are asking now for <u><em>a correct answer</em></u>. The correct answer *IS* 'Wilson' !!
Explanation:
Sorry I don' know what you're saying :(
Answer:
<B+<C=<DAC And <DAC+<CAB=180° so <B+<C+<A=180 Hence verified
Explanation:
Look at the diagram Sum of two interior angles=exterior angle <B+<C=<DAC And <DAC+<CAB=180° so <B+<C+<A=180 Hence verified
Self intrest and exchanging things for mutual benefit