Answer:
13
Step-by-step explanation:
None of the above should be 4th option
I have the same question and I have no idea sorry
Answer:
B and E
Step-by-step explanation:
perpendicular sides mean they will equal 90 degrees... so all rectangles and squares are perpendicular- a 90 degree triangle also is perpendicular. The Equatorial and the Acute triangle do not have 90 degree angles