4. find the circumference of a circle with a diameter of 4.5 cm
A. 13.06
B. 14.07
C. 12.08
D. 14.13

5. what os the formula in finding the circumference of a circle.
A. C=πdr2
B. C=πr2
C. C=2πr
D. C=π2r

6. find the circumference of the circle with radius of 37 cm

A. 332.36 cm
B. 132.46 cm
C. 432.26 cm
D. 232.36 cm

7. would a circle witha radius of 10 cm have the same circuimference as a circle with a diameter of 20 cm?
A. No,because diameter has a different value with raduis
B. No, the diameter is bigger than the raduis.
C. Yes, the raduis is half of a diameter.
D. Yes, both the diameter and raduis multipliedr by 3.14.

8. What happens to the circumference of a circle if its raduis is reduced to 1/2 the original length?
A. it will increased
B. it will doubled
C. it will be tripled
D. it will be decreased

9. The number of cubic units needed to make or fill a solid figure is called______.
A. perimeter
B. area
C. volume
D. circumference

10. Calculate the area of 2.8 m radius. Use 3.14 as the value of π.
A. 23.61 m2
B. 34.16 m2
C. 24.6176m2
D. 44.6176m2

pa answer po pls​