Only 3 and 5 i go to school tomorrow

for number 3, you need to measure it but number 5 is obtuse.

I can't do number 3 because you need to do that but number 5 ins obtuse because right angle has to be 90 degrees and acute is less then 90 degrees and obtuse is more than 90 degrees.

Hope this helps

:)

i would say b probably