Answer:
B
Step-by-step explanation:
The formula for a area of the first semi circle is
where r is the radius
Since 4 is the diameter, 2 is the radius
plug it in
so the area of the first circle is 2
now let find the second circle
Since the semi circle is twice the area of AB the diameter is 8 so the radius is 4.
Put it in the equation.
Now let find the third circle
Since it is twice the size of the second circle, the diameter is 16 and the radius is 8.
Now let add the area of the semi circle
Front estimation is using only the first value..
40+20+10=70
Answer:
-1.15
Step-by-step explanation:
Subtract 0.4 from −
0.75
.
Answer:
21.46
Step-by-step explanation:
Find the area of the square:
10cm×10cm= 100cm
find the are of the circle:
r=5
area of the circle=78.5398163397
Find the difference
100-78.5398163397=21.4601836603
21.46 is the shaded area
18x6 = 108
answer is
<span>A. 108 in2</span>