Radius, Diameter, Circumference

Radius, Diameter, Circumference

Assessment

Flashcard

Mathematics

7th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the definition of radius?

Back

The radius is the distance from the center of a circle to any point on its circumference.

2.

FLASHCARD QUESTION

Front

What is the definition of diameter?

Back

The diameter is the distance across a circle through its center, equal to twice the radius.

3.

FLASHCARD QUESTION

Front

What is the formula for calculating the circumference of a circle?

Back

Circumference = 2 × π × radius or Circumference = π × diameter.

4.

FLASHCARD QUESTION

Front

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

Back

Diameter = 2 × radius = 2 × 5 cm = 10 cm.

5.

FLASHCARD QUESTION

Front

If the diameter of a circle is 12 cm, what is the radius?

Back

Radius = diameter ÷ 2 = 12 cm ÷ 2 = 6 cm.

6.

FLASHCARD QUESTION

Front

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

Back

Circumference = 2 × π × 7 cm ≈ 43.98 cm.

7.

FLASHCARD QUESTION

Front

True or False: A circle can have more than one radius.

Back

False. A circle has an infinite number of radii, but they all measure the same length.

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