The only shape that has that much is a decagon 10 sides. t<span>he </span>sum<span> of the interior </span>angles of a Regular Decagon is 1440 degrees.
The formula for circumference is

.
To express the circumference exactly, plug the diameter in for

and put the

symbol in front of it. Don't multiply. This expresses the exact circumference.
Say you have the diameter of 17.
You can express the circumference with 17

.
Answer:
2.76
Step-by-step explanation:
smort
D 19 in2
find the area of a square, width times height
then find the area of the triangle, width times height divided by 2
Answer:55$
Step-by-step explanation:84.61 x .35 = 29.61
84.61 - 29.61 = 55