6 x 9 = 54
I think the know facts are 18 and 36, because they are the only basic numbers 6 and 9 can go into.
Sides and there angles are similar
8 2/3
because 6 1/2 divided by 3/4 is 8 2/3
The is c for this question
Answer:
90°
Step-by-step explanation:
note that
simplifies to 
There are 360° in one turn of the circle , then
× 360° = 360° ÷ 4 = 90°