The formula is : 3.14 times r(radius)^2
The ratio of 8/4 is 2:1 because 8/4 divided by 4 equals 2/1 which equals 2:1
Answer:
2826 inches^2
Step-by-step explanation:
The general formula for the total surface area of a regular pyramid is
T.S.A.=12pl+B
Where p represents the perimeter of the base, l the slant height and B the area of the base.
The perimeter of the base is.
p=2L+2W
P=2*10+2*9
P=20+18
P= 38 inches
The area of the base is.
B=10*9
B=90in^2
T.S.A.=12(38)(6)+90
T.S.A=2736+90
T.S.A=2826 inches^2
Hence the paper needed is 2826 inches^2
Circumference is 2πr so you subsitute for r also the radius with 10 so you get 20π as the diameter
Answer:
that he is trying to die
Step-by-step explanation:
i don't know just stating the obvious.
