can you guys help me find the mistakes in this solid of revolution video? (it's extra credit and could potentially save my life.)

Question

anonymous · Answer

anonymous · Answer

there are suppose to be 2 mistakes. thanks in advance!

anonymous · Answer

help.

anonymous · Answer

can you explain it to me i did not understand it

anonymous · Answer

there's suppose to be TWO mistakes in this video. if i find out what they are i get some extra credit. (5 pts.)

anonymous · Answer

so do you have options

anonymous · Answer

nope.

anonymous · Answer

okay

anonymous · Answer

heeeeeeeelp.

anonymous · Answer

1.so you can not find a angle in any shape

anonymous · Answer

2.if you want to find an angle it has to be straight not like a doughnut

anonymous · Answer

i hope that helps

anonymous · Answer

1. there is no way to find an angle in these? and 2. i can;'t find angles if it's a shell or a washer?