The perimeter is 72 because all sides on a square are the same measurements so you just have to do 18 times 4 to get 72
Answer:
3768
Step-by-step explanation:
The question is asking for the volume of the "cylinder" straw.
1cm = 10mm
30cm = 300mm
Volume of a cylinder = 
The radius is half of the diameter = 4/2 = 2
Radius squared is 4
Height is 300mm
1200mm * 3.14 = 3768
I am not very sure, since I am not that familiar with cylinders. Sorry if this is wrong.
Hope this helps :)
Have a great day!
You have to split it into triangles
but you have to know how to use pythagorus in 3D shapes
I believe it is the 9, with absolute values the number will always be positive so the absolute value of -9 is 9, which is the greatest out of all the options