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1. In a given circle, the radius is 9 cm. What is its diameterdiameter?
A. 18 m B. 18 cm C. 4.5 m D. 4.5 cm
2. Which of the following is the formula in solving for the area of a circle circle?
A. A= 2πr B. A= πr 2 C. A= πd D. A=2 πr 2
3. The diameter of a circle i s 8 cm, what is its area area?
A.50.24 cm 2 B .200.96 cm 2 C .25.12 cm 2 D .100.48cm 2
4. What is the radius of a circle if the area is 36m2?
A. 0.339 m B . 3.39 m C . 33.9 m D. 339m
5. What is the area of a circle if the radius is 5m 5m?
A. 15. 7m 2 B . 31.4 m 2 C. 78.5 m 2 D. 157m 2
For Numbers 6 - 10 , please refer to the problem: The bottom of a circular swimming pool with a diameter of 40 feet is made up of blue tiles. How many square feet is that?
6. What is asked in the problem problem?
A. The shape of the swimming pool B. The diameter of the swimming pool C. The color of the tiles D. T he area of the swimming pool
7. What is given in the problem problem?
A. Radius of 80m B. Diameter of 40 ft C. Radius of 80 ft D. Diameter of 40m
8. What is the appropriate formula to be used to solve the problem?
A. A= 2πr B . A= πr 2 C . A= πd D. A=2 πr 2
9. What is the answer to the problem problem?
A. 1, 256 ft 2 B. 1256 m 2 C. 1256 cm 2 D .1256 in 2
10. What is the correct conclusion for the problem problem?
A. The diameter of the swimming pool is 1256 ft 2 B. The radius of the swimming pool is 1256 m 2 C. The area of the swimming pool is 1256 ft 2 D. The circumference of the swimming pool is 1256 ft 2
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