Form na walang pamagat

1. What is the circumference of a circle with a radius of 5 cm?

• A) 10 cm
• B) 15.7 cm
• C) 31.4 cm
• D) 25 cm 1

2. If the diameter of a circle is doubled, how does the circumference change?

• A) It remains the same
• B) It doubles
• C) It triples
• D) It quadruples 1:

3. A circular track has a circumference of 100 meters. What is the radius of the track?

• A) 25 meters
• B) 50 meters
• C) 15.7 meters
• D) 20 meters 1

4. Which of the following formulas can be used to calculate the circumference of a circle?

• A) C=πr2
• B) C=2πr
• C) C=r2
• D) C=πd 1

5. A circle has a circumference of 62.83 cm. What is the approximate diameter of the circle?

• A) 20 cm
• B) 10 cm
• C) 15.7 cm
• D) 5 cm 1

6. The circumference of a circle can be calculated using the formula C=2πr, where r is the radius of the circle.

• A) True
• B) False

7. The circumference of a circle is directly proportional to its diameter.

• A) True
• B) False

8. If the circumference of a circle is doubled, the radius will also double.

• A) True
• B) False

10. The circumference of a circle can be found by multiplying the radius by 2 and then multiplying that result by π.

• A) True
• B) False

11. What is the formula for calculating the area of a circle?

• A) 2πr
• B) πr2
• C) dC​
• D) \frac{\pi d^2}{4 1