Circumference and Area of a Circle

Circumference and Area of a Circle

Assessment

Flashcard

Mathematics

7th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the formula for the circumference of a circle?

Back

The formula for the circumference (C) of a circle is C = πd or C = 2πr, where d is the diameter and r is the radius.

2.

FLASHCARD QUESTION

Front

What is the diameter of a circle?

Back

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

3.

FLASHCARD QUESTION

Front

How do you find the radius from the diameter?

Back

The radius (r) is half of the diameter (d). So, r = d/2.

4.

FLASHCARD QUESTION

Front

What is the area of a circle?

Back

The area (A) of a circle is given by the formula A = πr², where r is the radius.

5.

FLASHCARD QUESTION

Front

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

Back

The radius is 5 cm, since r = d/2.

6.

FLASHCARD QUESTION

Front

Calculate the circumference of a circle with a diameter of 4 feet (use π = 3.14).

Back

The circumference is 12.56 feet.

7.

FLASHCARD QUESTION

Front

What is the relationship between diameter and circumference?

Back

The circumference is directly proportional to the diameter, expressed as C = πd.

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