Answer:
1, scalene 2, equilateral 3, scalene 4, isosceles
Step-by-step explanation:
1. A, Because you're able to take any point on that plane and use it to name it.
2. b (not really sure how to explain....)
3. not sure.
4. d, since e is under plane p
50x30=1500 (this is an approximated rounded answer)