what is the area of a circle with the diameter of 10cm ?
66cm
78.5cm
66.5cm
10m
4. Multiple Choice
1 minute
1 pt
find the area of the circle below.
100 cm
225 cm
9 cm
28.26 cm
5. Multiple Choice
1.5 minutes
1 pt
Marisa purchases a pot for her father's garden. The diameter of the bottom of the pot is 18 cm. What is the area of the pot's bottom? (Round to the nearest whole number.)
28 cm²
57 cm²
254 cm²
1017 cm²
6. Multiple Choice
30 seconds
1 pt
a line that goes from one edge of the circle to another and crosses the center point
center
diameter
dime eater
radius
7. Multiple Choice
30 seconds
1 pt
a line from the center point to the edge of the circle
diameter
radio
radius
pi
8. Multiple Choice
1.5 minutes
1 pt
What is the area of a circle with a diameter of 10 cm ?
31.4 cm²
78.5 cm²
15.7 cm²
314 cm²
9. Multiple Choice
30 seconds
1 pt
What is the formula for areaof a circle given the radius?
A = πr
A = 2πr
A = πd
A = πr²
10. Multiple Choice
2 minutes
1 pt
What is the area of a circle with a radius of 21 cm?
1384.74 cm2
2142.12 cm2
4348.08 cm2
1289.12 cm2
11. Multiple Choice
5 minutes
1 pt
Which of the following choices is closest to the area of a circle? (d = 9 cm)
253.34 cm2
63.59 cm2
56.52 cm2
28.26 cm2
12. Multiple Choice
20 seconds
1 pt
What is the area of this circle?
82.13 m2
78.50 m2
314.16 m2
170.12 m2
13. Multiple Choice
1 minute
1 pt
The diameter of the face-off circle on an ice-hockey rink is 30 feet. Find its area.
675.6 ft2
29.67 ft2
545.8 ft2
706.5 ft2
14. Multiple Choice
30 seconds
1 pt
Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?
63.585 ft2
68.345 ft2
64.585 ft2
61.345 ft2
15. Multiple Choice
5 minutes
1 pt
Hannah drew a circle with a radius of 30 cm. Jonas drew a circle with a radius of 20 cm. What is the approximate difference in the areas of their circles?