On Question 2
so you know an obtuse angel is greater than 90 but less than 180. You can mark off E because 180 is a straight line. same goes with A and B because your left with is C and D. That’s all I can help with sadly. I forgot the math for this type of geometry.
Question 3
it goes up 3 and over 3. which looks like 3/3 and you know if the numerator and denominator are the same it equals 1. So the slope is 1.
