Answer:

Step-by-step explanation:
You want to isolate r. As you can see all the numbers on the right would be multiplied so to isolate r you would have to divide the numbers on the right and do the same to the left side.
Some parallelograms have 2 obtuse and 2 acute angles.
Parallelograms may have all 90 degree angles as well. These are also called rectangles.
When you "bend" a rectangle it naturally forms 2 acute and 2 obtuse angles.
Answer:
Your question is unclear
Step-by-step explanation:
100 drops =1fluid ounce
1 drop= 1/100 ounce
Hence
10 drops =10/100=1/10