What is the approximate value of $$\\pi$$ ?

The approximate value of $$\\pi$$ is 3.14.

How do you find the radius if you know the diameter?

The radius is half of the diameter: $$r = \frac{d}{2}$$ .

What is the area of a circle with a diameter of 10 cm?

The radius is 5 cm, so the area is $$A = \\pi (5)^2 \\approx 78.54 \\text{ cm}^2$$ .

What is the circumference of a circle with a diameter of 10 cm?

The circumference is $$C = \\pi (10) \\approx 31.42 \\text{ cm}$$ .

What is the formula to convert diameter to radius?

The formula is $$r = \frac{d}{2}$$ .

If a circle has an area of 113.04 cm², what is the radius?

To find the radius, use the formula: $$r = \sqrt{\frac{A}{\\pi}} = \sqrt{\frac{113.04}{3.14}} \approx 6$$ .

What is the relationship between area and circumference in a circle?

Both area and circumference depend on the radius, but they measure different properties: area measures the space inside, while circumference measures the distance around.

What is Thanksgiving trivia related to circles?

Thanksgiving trivia can include questions about circular foods like pies, which are often round, and can relate to the concepts of area and circumference.

Circles Word Problems (Circumference, Area) & Thansgiving Trivia Flashcards

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the formula for the area of a circle?

Back

Tags

CCSS.7.G.B.4

2.

FLASHCARD QUESTION

Front

What is the formula for the circumference of a circle?

Back

Tags

CCSS.7.G.B.4

3.

FLASHCARD QUESTION

Front

What is the difference between diameter and radius?

Back

The radius is half of the diameter. The diameter is the distance across the circle through the center.

4.

FLASHCARD QUESTION

Front

If the radius of a circle is 7 cm, what is the area?

Back

Tags

CCSS.7.G.B.4

5.

FLASHCARD QUESTION

Front

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

Back

Tags

CCSS.7.G.B.4

6.

FLASHCARD QUESTION

Front

What do you need to know to paint the trim around a circular window?

Back

You need to know the circumference of the circle.

7.

FLASHCARD QUESTION

Front

Back

Tags

CCSS.HSG.GMD.A.1

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