Answer:
112.3
Step-by-step explanation:
112.3 if the 2 was 5 or higher it would be 112.4
The circumference of a circle=2
r
We know that diameter is double the radius, and therefore can be written as d=2r
Circumference of a circle in terms of diameter is C=
d
The 2r cancels out
745 is what it would equal up to.
Formulas:
Area_semicircle = Πr2/2
Area_rectangle = lw
Given:
Semicircle is engraved in the rectangle
length_rectangle = 8
Assumption:
Diameter of semicircle is equivalent to length of rectangle
diameter_semicircle = length_rectangle
diameter_semicircle = 8
Based on assumption, radius_semicircle is equal to the width of the rectangle.
diameter_semicircle/2 = radius_semicircle
radius_semicircle = 4 = width of rectangle
Solve:
Area_rectangle = l*w = 4*8 = 32
Area_semicircle = Πr2/2 = Π(4)2/2 = 8Π = 25.12
<span>
Area_rectangle - Area_semicircle = 32 - 25.12 = 6.88</span>