Obsah kruhu
Obvod kruhu
Kombinovaný obsah
Kombinovaný obvod
100
What is the area of a circle of radius 2? 
4pi = 12.56
100
What is the circumference of a circle with diameter of 2?
2pi = 6.28
100
What is the area of this shape? 
18 square units
100
What is the perimeter of this shape? (Note, you can figure out the measure of y)
20 units
200
What is the area of a circle with a diameter of 6? 
if the diameter=6, then the radius is 3.
9 pi = 28.26
200
What is the circumference of a circle
with radius 1?
if the radius is 1, then the diameter is 2. so
c=pid. c= pi2= 6.28
200
What is the area of this shape? 
20 square units
200
What is the perimeter of this semicircle? 
c=pid/2 = pi2/2 = pi =3.14
add the base--> 5.14
300
A circle has an area of
25pi
What is the radius of the circle?
pir^2 =25pi
r^2 = 25
r=5
300
A circle has a circumference of 31.4 feet. How long is the diameter?
c=pid
10 feet
300
What is the area of this ice cream cone? 
triangle= (1/2) 2x2= 2.
semicircle= (1/2) pir^2= 1.57
total = 3.57
300
What is the perimeter of this shape? 
triangle part = 5+4 = 9
semicircle= (1/2) pid= (1/2)pi(3) = 4.71
total = 9+4.71= 13.71