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
Answer:
Yes, because animals have thoughts and do feel pain like us.
I don't have the same book as you so I would be helpful be more specific
Between the light bulb telephone and bullets which were some of developments in that time through out.