Answer:
x=3/2
Step-by-step explanation:
The formula for circumference of a circle is

.
You can plug in the diameter for

and multiply this by

to get the circumference of the circle.
Answer:
B. Side <em>a</em> is 7 inches long and side <em>b</em> is 6 inches long.
Step-by-step explanation:
Since the scale drawing is three times bigger than the actual object, divide both numbers by three to find the object size.
Side a:
21/3 = 7 inches
Side b:
18/3 = 6 inches
Your answer is 94/15
if mixed, it’s 6 4/15