A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?
c = 15π
c = 2π15
c = π(15²)
c = π(7.5²)
2. Multiple Choice
1.5 minutes
1 pt
Find the area of the circle below.
113.04 cm units²
18.84 cm units²
9 cm units²
28.26 cm units²
3. Multiple Choice
1.5 minutes
1 pt
What is the diameter of this circle?
3.5
6.5
6
7
4. Multiple Choice
1 minute
1 pt
What is the radius of this circle?
18
36
9
6
5. Multiple Choice
1 minute
1 pt
Find the circumference of the circle
21.98
153.86
43.96
615.44
6. Multiple Choice
1 minute
1 pt
Is the red line a radius or diameter of the circle?
Radius
Diameter
7. Multiple Choice
1 minute
1 pt
Is the red line a radius or diameter of the circle?
Radius
Diameter
8. Multiple Choice
1.5 minutes
1 pt
What is the radius?
18
72
38
14
9. Multiple Choice
1.5 minutes
1 pt
Find the circumference (to the nearest whole number)
88 in
44 in
116 square in
None of the above
10. Multiple Choice
1.5 minutes
1 pt
Does this picture show the diameter or radius of a circle?
Diameter
Radius
11. Multiple Choice
1.5 minutes
1 pt
Determine the radius of the penny
59.66 mm
9.5 mm
38 mm
119.32 mm
12. Multiple Choice
1.5 minutes
1 pt
Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?
11.32 ft
12.25 ft
10.99 ft
8.75 ft
13. Multiple Choice
1 minute
1 pt
What is the area of this circle?
8322.13
1134.11
4536.46
1267.09
14. Multiple Choice
1.5 minutes
1 pt
Ms. Merine calculated that her hoop earring has a diameter of 3.5 centimeters. What is the area of her earring (round to the hundreth's place)?