somebody can check out if my answers are right please

Question

anonymous · Answer

attachment

unknownrandom · Answer

Nevermind it is correct. Good job!

anonymous · Answer

Yeah, everything is right.

anonymous · Answer

orange master can you answer what is the best estimate for this product 81 x 409

anonymous · Answer

#2 is obtuse.

anonymous · Answer

@made, I already did.

unknownrandom · Answer

That is what I meant. My bad. Thanks though!

anonymous · Answer

If it were right, it would have the square in one angle like the third one did.

anonymous · Answer

orange master can you answer 
what is the best estimate for this product 81 x 409

anonymous · Answer

I'm confuse with #2 because the figure have 2 acute and 1 obtuse

anonymous · Answer

Even if it has one obtuse angle, it's obtuse.

anonymous · Answer

If all angles are acute, then acute triangle.
If one angles is obtuse, then obtuse triangle.
If it has one 90 degree angle, then right triangle.

anonymous · Answer

There can only be one obtuse angle because the interior angles in a triangle can only equal 180 degrees. Considering obtuse angles are more than 90 degrees, there an't be two in one triangle.

anonymous · Answer

*can't

anonymous · Answer

Do you get it?

anonymous · Answer

yes

anonymous · Answer

Thanks UnknownRandom and OrangeMaster for your help

anonymous · Answer

your welcome.  :)