Answer:
The greatest common factor of 169 and 81 is 1.
Step-by-step explanation:
9 squared is 81 and the greatest common factor of 169 and 81 is one. They have no other common factors. Please mark me brainliest and I hope this helps!
-6
All you have to do is plug in the -3 in the expression so the new expression would be -3(2) so the answer is -6
No not all right angles are congruent.
