Answer:
16 square feet
Step-by-step explanation:
The apothem of a square is equal to half of the length of one side.
This means that twice the apothem is equal to the length of one side.
2*2 = 4 ft
To get the area I will multiply the two sides (squares have equal sides):
4*4 = 16 ft^2
Answer:
D
Step-by-step explanation:
2 * sqrt(8) + 2 * sqrt(18) = 14
Answer:
$11,250 divided by 15 is 750, which means that the answer is the rate is $750 dollars spent in each sport.
178/25= 7.12 so she got the bonus of 26 every 7 times so 26x7=142 of the bonus
Now we multiply 8.20 by the 178 books sold =1,459.60 plus the bonus =$1,601.60 money earned
Circumference of a circle - derivation
This page describes how to derive the formula for the circumference of a circle.
Recall that the definition of pi (π) is the circumference c of any circle divided by its diameter d. Put as an equation, pi is defined as
π
=
c
d
Rearranging this to solve for c we get
c
=
π
d
The diameter of a circle is twice its radius, so substituting 2r for d
c
=
2
π
r
If you know the area
Recall that the area of a circle is given by
area
=
π
r
2
Solving this for r
r
2
=
a
π
So
r
=
√
a
π
The circumference c of a circle is
c
=
2
π
r
