Answer:
it is 5
Step-by-step explanation:i nailed agelbra and i got a 100% percent on the tesy
Hi there!
So first to find the diameter, you will need to find the radius of the circle because the diameter is twice the length of the radius.
Find the radius from the circumference, which is

.
C=

212=

212/

=r
Then solve for r.
Radius= 33.74
Then multiply the radius by 2 to find the diameter.
Diameter= 2 * 33.74
Diameter= 67.5 inchesHope this helps :)
4 books make 1 foot since there are 12 inches in a foot so 4 * 5 is 20
There are 20 books in the stack
Answer:
Obtuse
Step-by-step explanation:
All sides combined are greater 90