7th grade Quarter 3 FINAL

1. A circle has a radius of 50 centimeters. Which of these is closest to its area?

• 15708 square centimeters
• 7854 square centimeters
• 314 square centimeters
• 157 square centimeters

2. This circle has a radius of 5 units. Three students tried to calculate the circumference. Which one of these is the exact circumferece?

• 31.4 pi
• 31.4
• 10 pi

3. This graph shows examples of the relationship between the perimeter and the area of a square. Is the relationship proportional?

4. What is the area of a circle when the radius is 1?

5. What is the area of a circle when the radius is 2?

6. What is the area of a circle when the radius is 3?

7. What is the definition of radius?

8. What is the definition of diameter?

9. What is the definition of circumference?