What is the area of a circle with a radius of 3 m?

Area = $$\text{π} \times 3^2 = 28.3 \text{ m}^2$$ (using $$\text{π} \text{ as } 3.14$$ ).

What is the circumference of a circle with a radius of 4 inches?

Circumference = $$2 \times \text{π} \times 4 = 25.1 \text{ inches}$$ (using $$\text{π} \text{ as } 3.14$$ ).

What is the area of a circle with a diameter of 12 cm?

Area = $$\text{π} \times (6^2) = 113.1 \text{ cm}^2$$ (using $$\text{π} \text{ as } 3.14$$ ).

What is the circumference of a circle with a diameter of 8 inches?

Circumference = $$\text{π} \times 8 = 25.1 \text{ inches}$$ (using $$\text{π} \text{ as } 3.14$$ ).

What is the formula to find the area of a circle using diameter?

Area = $$\frac{{\text{π} \times d^2}}{4}$$ .

What is the approximate value of Pi if the circumference is 31.4 inches and the diameter is 10 inches?

Pi = $$\frac{31.4}{10} = 3.14$$ .

What is the area of a circle with a radius of 7 cm?

Area = $$\text{π} \times 7^2 = 153.9 \text{ cm}^2$$ (using $$\text{π} \text{ as } 3.14$$ ).

What is the circumference of a circle with a radius of 5 m?

Circumference = $$2 \times \text{π} \times 5 = 31.4 \text{ m}$$ (using $$\text{π} \text{ as } 3.14$$ ).

Area and Circumference Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What is the value of Pi?

Back

Approximately 3.14 or the fraction 22/7.

2.

FLASHCARD QUESTION

Front

What is the formula for the area of a circle?

Back

3.

FLASHCARD QUESTION

Front

What is the formula for the circumference of a circle?

Back

4.

FLASHCARD QUESTION

Front

If the radius of a circle is 5 cm, what is the area?

Back

5.

FLASHCARD QUESTION

Front

If the diameter of a circle is 10 cm, what is the circumference?

Back

6.

FLASHCARD QUESTION

Front

What is the relationship between diameter and radius?

Back

7.

FLASHCARD QUESTION

Front

What is the approximate value of Pi using circumference and diameter?

Back

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