Digits, Grade 7, Volume 1, Homework Helper

### 4-2: TEKS Practice

• 1. Find the circumference of the circle. Write an exact answer in terms of π.

• 2. Find the circumference of the circle. Write an exact answer in terms of π.

• 3. Find the circumference of the circle. Use 3.14 for π. Write an integer or decimal rounded to the nearest hundredth as needed.

• 4. Find the circumference of the circle. Use 3.14 for π. Round to the nearest hundredth as needed.

• 5. Find the diameter of the circle with the circumference C = 27cm. Use 3.14 for π. Round to the nearest tenth as needed.

• 6. Find, in centimeters, the circumference of a circle with a diameter of 0.15 m. Give an exact answer in terms of π.

• 7. The distance around a meteor crater is 9,687 ft. Find the diameter of the crater. Use 22 over 7 for π. Write an integer or decimal rounded to the nearest tenth as needed.

• 8. Estimation To protect an elm tree in your backyard, you need to put gypsy moth caterpillar tape around the trunk. The diameter of the tree is 2.7 ft. Round the diameter to the nearest foot in order to estimate the length of tape needed. Use 3.14 for π.

• 9.

• a. Writing What is the diameter of a circle with a circumference of 29.6 ft? Use 3.14 for π. Round to the nearest tenth as needed.

• b. How does tripling the circumference of the circle affect the diameter of the circle? Give at least three examples to support your answer.

• 10. Reasoning Circle I has a radius of 21 meters and Circle II has a radius of 28 meters.

• a. Find the circumferences of the two circles. Write an exact answer in terms of π.

• b. Is the relationship between the radius of a circle and the distance around the circle the same for all circles? Explain.

• 11. Think About the Process Circle I has a radius of 22 meters and Circle II has a radius of 27 meters.

• a. Find the circumference of each circle. Give exact answers in terms of π.

The circumference of Circle I is meters.

The circumference of Circle II is meters.

• b. The circumference of Circle II is meters greater than the circumference of Circle I.

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